|Publication number||US3886083 A|
|Publication date||May 27, 1975|
|Filing date||May 9, 1974|
|Priority date||May 9, 1974|
|Also published as||CA1039456A, CA1039456A1|
|Publication number||US 3886083 A, US 3886083A, US-A-3886083, US3886083 A, US3886083A|
|Original Assignee||American Bank Note Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (12), Referenced by (88), Classifications (20), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Laxer SAFETY INKS AND DOCUMENTS  Inventor: Herbert Laxer, Franklin Square,
 Appl. No.: 468,409
 US. Cl 252/301.2 R; 106/21; 106/23; 117/1; 117/33.5 T; 252/301.3 R;
 Int. Cl. C09k l/00; B44f 1/12; B42d 15/00 B42d 15/00  Field of Search 252/30l.2 R, 301.3 R; 117/1, 33.5 T; 106/21, 23; 283/8 R, 9 R
 1 References Cited UNITED STATES PATENTS 1,866,400 7/1932 Doushkess 106/21 1,916,606 7/1933 106/21 2,313,592 3/1943 ll7/l 2,555,474 6/1951 .117/1 X 2,950,050 8/1960 252/301.2 R 3,088,841 5/1963 Guertin 117/1 3,162,642 12/1964 McCafferty l17/l X 3,400,003 9/1968 Guertin 117/1 3,489,703 l/l970 Boruckl 260/22 3,561,990 2/1971 Dressler 117/33.5 3,741,907 6/1973 Beyerlin 252/30l.2 R 3,804,774 4/1974 Betts et al. 252/301.2 R
OTHER PUBLICATIONS Scientific American, Aug. 1942, page 58.
' [111 3,886,083 [451 May 27, 1975 Primary Examiner.lohn H. Mack Assistant Examiner-Aaron Weisstuch Attorney, Agent, or F irm-Cooper, Dunham, Clark, Griffin & Moran [5 7] ABSTRACT This safety ink is useful for printing a background of fine lines or dots on a document of value, such as a bank check. The background extends over an area which is adapted to be written upon. If the area in question is written upon and an attempt is thereafter made to eradicate the writing, the background changes color, thereby making it obvious upon visual inspection that an attempt has been made to alter the writing. The ink includes a dye which is soluble and bleachable and a fluorescent pigment whose fluorescence is enhanced if the attempted alteration is by means of a dissolving or bleaching technique, so that removal of part of the dye results in a change in color and also in an enhancement of the fluorescent intensity of the remaining printed matter. If an attempt is made to alter the writing by erasure, rather than eradication, some of the fluorescent pigment is removed, and its fluorescent intensity is consequently decreased. Hence, an attempted alteration is detectable either under ordinary light by the change in visible color or under ultraviolet light by the change in the fluorescent intensity.
2 Claims, N0 Drawings 1 SAFETY INKS AND DOCUMENTS BACKGROUND OF THE INVENTION The safety inks and documents disclosed herein are improvements over those shown in the US. Pat. Nos.
to Guertin No. 3,088,841 and No. 3,400,003, both of which are assigned to the assignee of the present application. Guertin US. Pat. No. 3,088,841 discloses a printed document having adjacent background areas printed in different inks of the same color. One of the inks is bleachable and soluble in water and insoluble in the lower alcohols and lower ketones. The other ink is soluble only in the lower alcohols and lower ketones and is insoluble in water and unbleachable. Hence, the two areas react differently to alteration attempts involving. either bleaching or solution in water or in the ,lower alcohols and lower ketones. However, any such alteration attempt produces a color contrast between the two areas, which makes the attempted alteration readily'detectable visually.
Guertin U.S. Pat. No. 3,400,003, shows a document which is printed with two superimposed background patterns, of different colors, each composed of fine lines or dots. One of the patterns is printed in ink whose coloring matter contains a component which is bleachable, and soluble in water and in the lower alcohols and ketones. The other pattern is printed in an ink which is nonbleachable and not soluble in water and the lower alcohols and lower ketones. Again, any attempt to alter the. document by bleaching or solution produces a color contrast.
BRIEF SUMMARY OF THE lNVENTlON I safety inks and documents described in the Guertin patents mentioned above. According to the present invention, the background, which may be either an even color or an array of elements such as lines or dots, is printed in an ink whose coloring matter includes a dye which is bleachable and soluble in water and the lower alcohols and ketones, and a fluorescent pigment which is not bleachable, insoluble in water, and no more than very slightly soluble in the lower alcohols and ketones, but which is at least partly removed by an attempted erasure.
A document in accordance with the present invention may include two sets of background elements printed in adjacent areas in the same color. Alternatively, the document may include two superimposed sets of background elements printed in different colors.
However, the present invention does not require more than a single set of background elements, or a single even background color, printed in a single ink.
DETAILED DESCRIPTION This invention relates to safety papers, ie., printed documents, such as negotiable instruments, which are adapted for the insertion of'names, amounts, etc., either by hand, by typewriter or other mechanical devices and which are sensitive to attempts to alter inserted names, amounts, etc. The invention includes bothinks designed to give the required sensitivity and having the characteristics necessary for such documents, and the documents printed with such inks. By sensitivity to attempted alteration is meant that an attempt to alter the printed document results in an observable change in the appearance of the document so as to alert a person receiving it to the fact that the document has been altered.
Documents of value are most commonly written upon in ink. The inks which are commonly used to write on documents of value may be classified either as conventional inks, ball point pen inks, or transfer sheet inks. Conventional inks are water solutions of either a dye, typically an aniline dye, or a ferrous salts which oxidizes to a ferric salt after'writing, or combinations of both a salt and a dye.
The techniques of eradication of conventional inks were established many years ago. Where the dried ink was water soluble, such techniques simply involved the use of water as a solvent (socalled washable ink). Where the dried ink was not water soluble, the eradication techniques employed some type of bleaching reaction. The bleaching solutions (ink eradicators) for such inks are commonly sold.
A ball point pen ink is typically relatively stiff and heavy and may consist of one of the higher glycols as a vehicle, with an aniline dye for coloring material. Many of the ball point pen inks cannot be eradicated either by the use of water as a solvent or by the bleaching method.
While the details of .all processes which might eradicate ball point pen inks are unknown, it has been determined that all processes so far known involve the use, at some stage of the process, of a solvent selected from the lower alcohols or lower ketones. By lower" is meant that the number of carbon atoms in the particular alcohol or ketone is not greater than 8.
There have been recognized in the past two general techniques of eradication which may be classified as line eradication and sheet eradication. Line eradication involves the application of eradicating solution only to the particular line or lines to be eradicated. In sheet eradication, the entire sheet or document is immersed in the solvent or other agent used. The line eradication technique is the one most frequently employed in connection with conventional inks. It has been determined that the ball point pen inks require, in all the known processes, the sheet eradication technique.
It is also known that time is very important in the ball point ink eradication techniques. To be successful, the eradication must be completed within a relatively short time, of the order of 30 seconds. It the eradication has not been completed in that time, then the solvent may start to spread the ball point ink into the paper, thereby frustrating the attempted eradication.
Transfer sheet ink is used herein as a generic term to describe the materials employed on transfer sheets to produce a mark on an underlying sheet when the overlying sheet is written or typewritten upon. The term transfer sheet includes typewriter ribbons, carbon paper, carbonless carbon paper and any other sheet, usually employing a coated under surface, which is sensitive to localized pressure on the top of the overlying sheet to make a mark on the underlying sheet. The term transfer sheet ink is intended to include those materials which are latent in that there is no observable color on the sheet or on the underlying sheet until after the writing is applied.
Most transfer sheet inks may be described as either solvent types, in which the coloring matter is dissolved in material analogous to those used in the ball point pen inks, or wax types, in which the coloring material is carried by a wax vehicle, whether in solution or by simply mixing it with the wax vehicle.
Transfer sheet inks and the techniques for eradicating them. are of many different types. Some such inks are water soluble. Some are soluble in the lower alco lhols or in the lower ketones or both. Some are bleachable. Some can be removed only by mechanical erasure.
The inks of the present invention produce an observable indication that an attempt has been made to alter written material on a document, whether that attempt was made by a solution technique, by bleaching, or by mechanical erasure Safety papers prepared in accordance with the invention have printed matter thereon, which is changed in color and in its fluorescent intensity by the techniques presently known for eradicating ball point pen ink. Typically, the printed matter so changed consists of a background ofclosely spaced fine lines, which may appear in any suitable configuration of characters, words, geometric figures, etc. The ink in which at least some of the printed patterns of the background appear should be soluble in organic solvent selected from the class having not more than 8 carbon atoms and consisting of the lower alcohols and lower ketones. There are two principal reasons for so limiting the class of organic solvents. One reason is that the alcohol and ketones as defined above are the ones most available commercially, and hence most likely to be used by a person attempting to alter a document Another reason is that the higher ketones and alcohols do not act rapidly enough as solvents, and spread the ink into the paper instead of carrying it away. Consequently, a person seeking to alter such a document is frustrated if he attempts to use any of the higher alcohols or ketones.
Where more than one ink is used, the two inks must be compatible if a single impression printing process is to be employed. At least one of the inks must include a coloring matter component soluble in the lower alcohols and lower ketones, and a fluorescent pigment which is insoluble in water and has only a very low solubility in the lower ketones and lower alcohols.
The ink components may or may not be soluble in water, as desired. Typically, it is desired that the ink components which are soluble in the lower alcohols and lower ketones be also soluble in water. However, in some cases, printed documents may be exposed for long periods of time to the air in humid climates. In those cases, it is essential that the ink components employed should not be so water soluble that high humidity will make it start to run and destroy the pattern.
VEHICLE The vehicle is the one described in U.S. Pat. No. 3,400,003, which is suitable from the standpoint of being miscible with the various coloring matters employed in inks manufactured according to the invention and which is also soluble in water and in the lower alcohols and ketones. This vehicle consists essentially of about 20% glycerine. about 64% sorbitol and about l6% water. These percentages are by weight. The proportion of glycerine employed in this vehicle may vary from about 10% to about 30%. If the proportion of glycerine is reduced below about 10%, tendencies to crystallize are observed. If the proportion of glycerine is increased above about 30%, the consistency of the vehicle becomes too thin for proper operation on conventional printing presses. The relative proportions of sorbitol and water should remain about the same (i.e. about by weight of the material other than glycerine should be sorbitol and about 20% water).
Printing inks containing this vehicle perform satisfactorily on the printing press and are stable during printing and after being applied to the paper by the printing press. The resulting printed lines support writing by all the usual writing media without noticeable bleed and feather of the written line. Additionally, the resulting printed material is stable to handling during use and does not tend to change in color and effectively responds in the intended to fraudulent manipulation of the written material to create a noticeable change in the appearance of the document.
The documents printed with the inks and in accordance with the techniques of the Guertin patents mentioned above depend solely upon changes in color of the background elements to show that an attempt has been made to alter the writting material placed on the document. It has been discovered that in some cases. as for example, where an alteration is carefully performed and new writting is placed on the document in wide lines which cover the alteration, it may be difficult to observe the attempted alteration by observing change in color alone.
COLORING MATTER It is therefore now proposed to use a fluorescent pigment in the ink, in such a manner that a document which has been subject to an attempted alteration will show a change in intensity of the fluorescence, in addition to the change in color under normal light. The change may be either an increase or decrease in fluorescent intensity in those areas where the alteration technique has been applied. In either event, when the document is viewed in ultraviolet light, the generally even tone of the pattern of background elements will be interrupted, in each location where an alteration has been attempted, by either intensified fluorescence or lessened fluorescence, depending upon the particular type of alteration technique which has been employed. The pigment selected should be non-bleachable, insoluble in water, and no more than very slightly soluble in the lower alcohols and lower ketones. A substance is defined as very slightly soluble by Hackhs Chemical Dictionary, if it requires from 1,000 to 10,000 parts of solvent to dissolve one part of the substance. A substance is defined by the same authority as insoluble if it requires more than 10,000 parts of solvent to dissolve one part of the substance.
If the technique employed has been one involving a solution or bleaching, then a part of the solution sensitive dye or bleaching sensitive dye will have been removed, but the fluorescent pigment will not have been removed. Since the dye tends to mask the pigment, there will be a resulting increase in fluorescent intensity in any area where a solution or bleaching technique has been applied. This intensified fluorescence will be readily visible if the document in question is viewed under an ultraviolet light.
If a line eradication technique has been employed, then the areas which were subjected to the eradicating solution will present a contrast to the other areas of the background. This contrast will be observable in visible light as a color contrast and will also be observable in ultraviolet light as a contrast between two areas of different fluorescent intensity, i.e., the eradicated areas will be brighter than the areas where no eradicating solution has been used.
If a sheet eradicating technique .has been employed, then there will be no areas of contrast in the background visible on the face of the document, either in natural light or ultraviolet light. On the other hand, the entire background of the document will be changed in color. This color change should be readily noticeable under natural light. Under ultraviolet light, the entire document will fluoresce more intensely than would be the case if no eradication had been attempted.
The foregoing statements about the appearance of documents subjected to sheet eradication techniques are applicable to documents where backgrounds are printed in a single ink. Where the background is printed in different ink on different areas, as in the Guertin U.S. Pat. No. 3,088,841, the sheet eradication technique will bring out the color differences in those areas and will readily appear as an observable color contrast under natural light.
If an attempt is made to alter the writing on a document by erasure, i.e., by mechanically removing the deposit of ink left by the writing, then some of the fluorescent pigment is also necessarily removed ty the same operation, so that the fluorescence in the altered area is reduced.
Ultraviolet viewers are in common use by bank tellers, cashiers, and the like, so that a person accepting such a document can readily make a check of its validity by placing it under an ultraviolet light. This test can confirm a suspicion that a particular document has been altered, in those instances where a visual inspection gives only borderline results. Furthermore, it can detect some alterations which are not observable by a visual test.
EXAMPLE The ink may consist essentially of the vehicle described above and coloring matter including a fluorescent pigment such as Resoform Fluorescent Yellow (Pigment Yellow No. 101, CI. No. 48052, GAF Corp.) which may be 70.6 by weight of the coloring matter and a mixture of dyes including:
of coloring matter by weight 6.0 9.3
Acid Blue, C.l. No. 42755 Croceine Acid Red, E.l. No. 27290, Tartrazine C Acid Yellow No. 23, Cl. No. 19140 Fuschine S.B.P. Basic Violet No. 14, CI. No. 42510 6 published by Society of Dyeists and Colourists, PO. Box 244, 82 Grattan Road, Bradford, Yorkshire, England.
The particular pigment described above is not bleachable and is insoluble in water and in the lower alcohols and ketones.
1. A printing ink consisting essentially of coloring matter and a vehicle soluble in water and lower alcohols and lower ketones, said vehicle consisting essentially of glycerine, sorbitol and water, the glycerine being present in an amount in the range 10-30% by weight based on said vehicle, the remaining percentages of sorbitol and water having a weight ratio of about 4: 1 said coloring matter including a dye soluble in lower alcohols and lower ketones wherein said lower alcohols and said lower ketones contain not more than 8 carbon atoms per molecule, and a fluorescent pigment which is non-bleachable, insoluble in water and no more than very slightly soluble in said lower alcohols and lower ketones.
2. A printed document comprising:
1. an area adapted to be writted upon and sensitive to attempted alteration of written material thereon by either solution, bleaching or erasure;
2. said area having a background of printed elements including a pattern printed in an ink consisting essentially of coloring matter and a vehicle soluble in water and lower alcohols and lower ketones;
a. said vehicle consisting essentially of glycerine, sorbitol, and water, the glycerine being present in an amount in the range 10-30% by weight based on said vehicle, the remaining percentages of sorbitol and water having a weight ratio of about 4:1;
b. said color matter including:
i. a dye soluble in lower alcohols and lower ketones, wherein said lower alcohols and said lower ketones contain not more than eight carbon atoms per molecule, said dye being bleachable and soluble in water, said dye being at least partly removed by solution or bleaching, and thereby changing the color of the background in response to attempted alteration of written material by solution or bleaching techniques; and
a fluorescent pigment which is nonbleachable, insoluble in water, and no more than very slightly soluble in said lower alcohols and lower ketones, said pigment having its ,fluorescence enhanced by removal of the dye during solution or bleaching, and being at least partly removedby erasure, thereby changing the color and flourescent intensity of the background, when viewed under ultraviolet light, in response to attempted alteration of written material by erasure.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1866400 *||Mar 6, 1928||Jul 5, 1932||Milton C Johnson Company||Safety paper|
|US1916606 *||Oct 9, 1929||Jul 4, 1933||Milton C Johnson Company||Safety paper|
|US2313592 *||Sep 26, 1940||Mar 9, 1943||Todd Co Inc||Safety paper and process of preparing the same|
|US2555474 *||Jun 4, 1948||Jun 5, 1951||De Vries John||Safety ink|
|US2950050 *||Mar 4, 1957||Aug 23, 1960||Ncr Co||Record member|
|US3088841 *||Mar 1, 1960||May 7, 1963||American Bank Note Co||Safety inks and documents|
|US3162642 *||Jul 15, 1960||Dec 22, 1964||Nat Marking Mach Co||Fluorescent pigments|
|US3400003 *||Aug 9, 1966||Sep 3, 1968||American Bank Note Co||Safety inks and documents|
|US3489703 *||Sep 2, 1966||Jan 13, 1970||Magnaflux Corp||Quick-drying marking paint|
|US3561990 *||May 8, 1968||Feb 9, 1971||Koppers Co Inc||Fluorescent ink and method for making materials fluoresce|
|US3741907 *||Mar 16, 1971||Jun 26, 1973||Giegle G & Co Gmbh||Fluorescent pigments having an isocyanate resin base|
|US3804774 *||Aug 3, 1972||Apr 16, 1974||Horizons Inc||Inks which fluoresce when exposed to near or middle ultraviolet radiation|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4136229 *||Oct 25, 1977||Jan 23, 1979||Societe Anonyme Dite: Arjomari-Prioux||Security paper|
|US4183989 *||Nov 29, 1977||Jan 15, 1980||Portals Limited||Security papers|
|US4411946 *||Dec 22, 1981||Oct 25, 1983||Bayer Aktiengesellschaft||Impregnating paper with 7-hydroxy-coumarin compounds|
|US4627642 *||Sep 5, 1985||Dec 9, 1986||Sotimag (Sarl)||Method of marking for deterring fraud with valuable documents|
|US4884828 *||Feb 4, 1988||Dec 5, 1989||Cmb Packaging (Uk) Limited||Security documents|
|US4936607 *||Jan 27, 1988||Jun 26, 1990||Moore Business Forms, Inc.||Security for images formed by impact based systems|
|US5033773 *||Mar 8, 1990||Jul 23, 1991||Moore Business Forms||Security for images formed by impact based systems|
|US5058925 *||Dec 13, 1989||Oct 22, 1991||The Standard Register Company||Leach resistant ink for protecting documents from alteration and document protected thereby|
|US5064221 *||Mar 2, 1990||Nov 12, 1991||Francotyp-Postalia Gmbh||Method for distinguishing printed originals from copies|
|US5135569 *||Aug 24, 1990||Aug 4, 1992||W. R. Grace & Co.-Conn.||Ink composition containing fluorescent component and method of tagging articles therewith|
|US5232494 *||Jul 31, 1992||Aug 3, 1993||Binney & Smith Inc.||Color changing compositions|
|US5326388 *||Jul 16, 1993||Jul 5, 1994||Binney & Smith Inc.||Color changing compositions|
|US5352282 *||Jun 16, 1993||Oct 4, 1994||Binney & Smith, Inc.||Color changing compositions|
|US5360628 *||Jan 22, 1993||Nov 1, 1994||Butland Trust Organization||Technique for labeling an object for its identification and/or verification|
|US5362167 *||Jan 29, 1993||Nov 8, 1994||The Gillette Company||Fiber marker including an erasable ink|
|US5378752 *||Nov 5, 1992||Jan 3, 1995||The Gillette Company||Ink eradicator system including film forming polymer|
|US5421869 *||May 28, 1993||Jun 6, 1995||Nocopi Technologies, Inc.||Security marking method and composition|
|US5460647 *||Feb 10, 1995||Oct 24, 1995||Binney & Smith Inc.||Color-changing marking composition system|
|US5464470 *||Feb 10, 1995||Nov 7, 1995||Binney & Smith Inc.||Color-changing marking composition system|
|US5478382 *||Jul 5, 1994||Dec 26, 1995||Binney & Smith Inc.||Color changing compositions for use on non-porous surfaces|
|US5486228 *||Jul 5, 1994||Jan 23, 1996||Binney & Smith Inc.||Washable color changing compositions|
|US5489331 *||Jul 5, 1994||Feb 6, 1996||Binney & Smith Inc.||Color changing compositions using acids|
|US5492558 *||Oct 3, 1994||Feb 20, 1996||Binney & Smith Inc.||Color changing compositions for highlighters|
|US5498282 *||Oct 3, 1994||Mar 12, 1996||Binney & Smith Inc.||Color changing pan paint compositions|
|US5503665 *||Oct 4, 1994||Apr 2, 1996||Binney & Smith Inc.||Latent image compositions|
|US5510199 *||Jun 6, 1994||Apr 23, 1996||Clarke American Checks, Inc.||Photocopy resistant document and method of making same|
|US5516362 *||Jun 5, 1995||May 14, 1996||Nocopi Technologies, Inc.||Security marking method and composition|
|US5516590 *||Jul 15, 1993||May 14, 1996||Ncr Corporation||Fluorescent security thermal transfer printing ribbons|
|US5549742 *||Sep 16, 1993||Aug 27, 1996||Gillette Company||Assembly or set of different color inks and an assembly of writing instruments|
|US5599578 *||Nov 1, 1994||Feb 4, 1997||Butland; Charles L.||Technique for labeling an object for its identification and/or verification|
|US5599853 *||Oct 7, 1994||Feb 4, 1997||The Gillette Company||Erasable inks|
|US5649999 *||Apr 8, 1996||Jul 22, 1997||The Gillette Company||Ink eradicator system|
|US5766324 *||Dec 28, 1995||Jun 16, 1998||Hitachi Maxell, Ltd.||Ink composition, printed matter, and thermal transfer recording medium|
|US5789019 *||Jul 17, 1995||Aug 4, 1998||Alagao Aktiengesellschaft||Method for protecting against forgery sheet-like printed documents|
|US5807224 *||Apr 25, 1995||Sep 15, 1998||Southpac Trust International, Inc.||Sheets and sheet rolls of wrapping material having information selectable by choice blocks|
|US5916357 *||Mar 25, 1997||Jun 29, 1999||The Gillette Company||Eradicable inks|
|US5919858 *||Mar 21, 1997||Jul 6, 1999||The Gillette Company||Erasable inks|
|US5934044 *||Jan 30, 1998||Aug 10, 1999||Southpac Trust International, Inc.||Method of forming a flower pot or flower pot cover having a label incorporated therein|
|US5944881 *||Jul 25, 1997||Aug 31, 1999||The Standard Register Company||Tri-component security numbering ink|
|US6030657 *||Jan 7, 1998||Feb 29, 2000||Dna Technologies, Inc.||Labeling technique for countering product diversion and product counterfeiting|
|US6149721 *||Feb 3, 1999||Nov 21, 2000||The Gillette Company||Solvent-based pen inks|
|US6159585 *||Sep 23, 1999||Dec 12, 2000||Georgia-Pacific Corporation||Security paper|
|US6221432||Apr 28, 1999||Apr 24, 2001||Yichun Wang||Eradicable inks|
|US6232124||Nov 13, 1998||May 15, 2001||Verification Technologies, Inc.||Automated fingerprint methods and chemistry for product authentication and monitoring|
|US6458595||Jan 24, 2001||Oct 1, 2002||Verification Technologies, Inc.||Automated fingerprint methods and chemistry for product authentication and monitoring|
|US6490030||Jan 18, 1999||Dec 3, 2002||Verification Technologies, Inc.||Portable product authentication device|
|US6512580||Oct 27, 1999||Jan 28, 2003||Verification Technologies, Inc.||Method and apparatus for portable product authentication|
|US6589626||Mar 29, 2001||Jul 8, 2003||Verification Technologies, Inc.||Copy-protected optical media and method of manufacture thereof|
|US6638593||Jun 12, 2001||Oct 28, 2003||Verification Technologies, Inc.||Copy-protected optical media and method of manufacture thereof|
|US6707539||Oct 18, 2002||Mar 16, 2004||Verification Technologies, Inc.||Portable product authentication device|
|US6786954 *||May 9, 2000||Sep 7, 2004||The Board Of Trustees Of The Leland Stanford Junior University||Document security method utilizing microdrop combinatorics, ink set and ink composition used therein, and product formed|
|US6936334 *||Jun 7, 2002||Aug 30, 2005||Eastman Kodak Company||Steganographically encoded media object having an invisible colorant|
|US7079230||Apr 24, 2000||Jul 18, 2006||Sun Chemical B.V.||Portable authentication device and method of authenticating products or product packaging|
|US7083665 *||Oct 7, 2003||Aug 1, 2006||Sanford, L.P.||Highlightable marking composition, method of highlighting the same, highlightable marking composition kit, and highlighted marking composition complex|
|US7124944||Oct 2, 2002||Oct 24, 2006||Verification Technologies, Inc.||Product packaging including digital data|
|US7241399||Sep 7, 2001||Jul 10, 2007||Centrum Fuer Angewandte Nanotechnologie (Can) Gmbh||Synthesis of nanoparticles|
|US7303803||Dec 1, 2004||Dec 4, 2007||Verification Technologies, Inc.||Copy-protected optical media and method of manufacture thereof|
|US7427318||Oct 1, 2004||Sep 23, 2008||Sanford, L.P.||Highlightable and highlighted mixtures, marking instruments, and methods of using the same|
|US7486790||Aug 3, 2000||Feb 3, 2009||Verification Technologies, Inc.||Method and apparatus for controlling access to storage media|
|US7488380||May 11, 2006||Feb 10, 2009||Sanford, L.P.||Highlighting marking compositions, highlighting kits, and highlighted complexes|
|US7660415||Feb 9, 2010||Selinfreund Richard H||Method and apparatus for controlling access to storage media|
|US7704308||Dec 21, 2004||Apr 27, 2010||Sanford, L.P.||Method of highlighting with a reversible highlighting mixture, highlighting kit, and highlighted complex|
|US8114207 *||Mar 1, 2006||Feb 14, 2012||Secutech International Pte. Ltd.||Marker solution to be applied by means of an inkjet printer|
|US9012871||May 1, 2014||Apr 21, 2015||Delphax Technologies Inc.||Use of fluorescent inks for document authentication|
|US20030112423 *||Oct 18, 2002||Jun 19, 2003||Rakesh Vig||On-line verification of an authentication mark applied to products or product packaging|
|US20040000787 *||Jan 31, 2003||Jan 1, 2004||Rakesh Vig||Authentication mark for a product or product package|
|US20040023397 *||Aug 5, 2002||Feb 5, 2004||Rakesh Vig||Tamper-resistant authentication mark for use in product or product packaging authentication|
|US20050083829 *||Dec 6, 2004||Apr 21, 2005||Selinfreund Richard H.||Method and apparatus for controlling access to storage media|
|US20050120919 *||Oct 1, 2004||Jun 9, 2005||Leighton Davies-Smith||Highlightable and highlighted mixtures, marking instruments, and methods of using the same|
|US20050158471 *||Dec 21, 2004||Jul 21, 2005||Leighton Davies-Smith||Method of highlighting with a reversible highlighting mixture, highlighting kit, and highlighted complex|
|US20060023600 *||Sep 29, 2005||Feb 2, 2006||Verification Technologies, Inc.||Method and apparatus for controling access to storage media|
|US20060066465 *||Sep 6, 2005||Mar 30, 2006||Gotthilf Koerner||Circuit configuration for analog/digital conversion|
|US20070001011 *||Aug 31, 2006||Jan 4, 2007||Verification Technologies, Inc.||Product packaging including digital data|
|US20070017413 *||May 11, 2006||Jan 25, 2007||Sanford, L.P.||Highlighting marking compositions, highlighting kits, and highlighted complexes|
|US20080066090 *||Oct 24, 2007||Mar 13, 2008||Verification Technologies, Inc.||Storage Media Access Control Method and System|
|US20080144459 *||Feb 8, 2008||Jun 19, 2008||Verification Technologies, Inc.||Method and apparatus for controlling access to storage media|
|US20090311415 *||Mar 1, 2006||Dec 17, 2009||Andre Josten||Marker Solution to be Applied by Means of an Inkjet Printer|
|CN1060494C *||May 22, 1997||Jan 10, 2001||石家庄印钞厂||Anti-altering printing ink|
|CN1890333B||Oct 6, 2004||Jun 8, 2011||桑福德有限合伙人公司||Highlighting ink with fading dye , marking tool and its usage method|
|DE2834459A1 *||Aug 5, 1978||Mar 6, 1980||Staedtler Fa J S||Reducible ink for marking or coating daylight projection film - contains water, glycol, reducible dyestuff and wetting agent|
|EP1707611A2||Sep 7, 2001||Oct 4, 2006||Nanosolutions GmbH||Synthesis of nanoparticles|
|WO1994006872A1 *||Sep 16, 1993||Mar 31, 1994||The Gillette Company||Assembly or set of different color inks and an assembly of writing instruments|
|WO1994016902A1 *||Jan 21, 1994||Aug 4, 1994||Butland Trust Organization||Technique for labeling an object for its identification and/or verification|
|WO1996009590A1 *||Sep 18, 1995||Mar 28, 1996||Nevin William W||System and method for generating and printing printouts and for detecting and preventing alteration of bank instrument|
|WO1998034990A1 *||Feb 9, 1998||Aug 13, 1998||Jong Yol Kim||Interior wallpaper printing composition and manufacturing method thereof|
|WO1999034984A1 *||Nov 12, 1998||Jul 15, 1999||Dna Technologies, Inc.||Labeling technique for countering product diversion and product counterfeiting|
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|U.S. Classification||252/301.16, 106/31.28, 106/31.32, 283/113, 283/92, 428/195.1, 427/7, 283/95, 106/31.58, 428/916|
|International Classification||G07D7/00, C09D11/00, B41M3/14|
|Cooperative Classification||Y10S428/916, B41M3/144, G07D7/00, C09D11/50|
|European Classification||C09D11/50, G07D7/00, B41M3/14F|
|Sep 18, 1990||AS||Assignment|
Owner name: CITIBANK, N.A., 399 PARK AVE., NEW YORK, NY 10043
Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN BANK NOTE COMPANY, A CORP. OF NY;REEL/FRAME:005439/0348
Effective date: 19900725
Owner name: CITIBANK, N.A., NEW YORK
Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN BANK NOTE COMPANY;REEL/FRAME:005435/0759
|May 9, 1988||AS||Assignment|
Owner name: ABN DEVELOPMENT CORPORATION
Free format text: SECURITY INTEREST;ASSIGNOR:MELLON BANK, N.A.;REEL/FRAME:004882/0603
Effective date: 19880128
Owner name: ABN SECURITIES SYSTEMS, INC.
Owner name: AMERICAN BANK NOTE COMPANY
Owner name: EIDETIC IMAGES, INC.
Owner name: HORSHAM HOLDING COMPANY, INC.
Owner name: INTERNATIONAL BANKNOTE COMPANY, INC.
Owner name: OLD DOMINION FOILS COMPANY, INC.
|Feb 19, 1988||AS||Assignment|
Owner name: AMERICAN BANK NOTE COMPANY
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MELLON BANK, N.A.;REEL/FRAME:005029/0228
Effective date: 19880128
|Mar 4, 1985||AS||Assignment|
Owner name: MELLON BANK, N.A. A NATIONAL BANKING ASSOCIATION O
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO AGREEMENT RECITED;ASSIGNORS:INTERNATIONAL BANKNOTE COMPANY, INC.;AMERICAN BANK NOTE COMPANY;ABN DEVELOPMENT CORPORATION;AND OTHERS;REEL/FRAME:004381/0272
Effective date: 19841130