Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3773684 A
Publication typeGrant
Publication dateNov 20, 1973
Filing dateMar 3, 1970
Priority dateJun 29, 1964
Publication numberUS 3773684 A, US 3773684A, US-A-3773684, US3773684 A, US3773684A
InventorsMarks A
Original AssigneeMarks A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dipolar electro-optic compositions and method of preparation
US 3773684 A
Images(29)
Previous page
Next page
Description  (OCR text may contain errors)

nited States Patent 1191 Marks [45] Nov. 20, 1973 [5 BIPOLAR ELECTRO-OPTIC 3,241,948 3/1966 Clarborne et a1. 75 .5 B COMPOSITIONS AND METHOD 01 3,367,766 2/1968 Harrington et al.... 29/192 2,456,313 12/1948 Pratt 106/290 PREPARATION 3,007,160 10/1961 l-lalpem 343/18 [76] Inventor: Alvin M, Marks, 153-16 10th Ave 3,171,106 2/1965 Lemmond 340 174.1 whitestone, N Y 3,213,027 10/1965 Fatuzzo et a1. 252/63.2 3,513,449 5/1970 Young 340/173 [22] Filed: Mar. 3, 1970 2 l N 16 185 OTHER PUBLICATIONS App o" Powder Metallurgy, Goetzel, Vol. 1, lnterscience Pub- Related US. Application Data lishers, Inc., N.Y. pp. 9297 copy in library (1949). [63] Continuation-in-part of Ser. No. 378,836, June 29,

964, Pal 3,512,876 Primary ExaminerJohn D. Welsh AttorneyPhilip D. Amins [52] U.S. Cl. 252/309, 348/18, 106/288 B, 148/16, 252/300, 350/267 [51] Int. Cl B01j 13/00 [57] ABSTRACT [58] Field of Search 252/63.5, 63, 309; Methods and apparatus incorporating Suspensions of 343/18 A; 29/192 R; 75/.5; l48/1.6; 350/267 assymetric minute dipolar particles for thecontrol of electromagnetic radiation. The physical electrical and [56] References Cited optica1 properties of the dipolar particles and their UNITED STATES PATENTS suspending medium are specified in conjunction with apparatus employing them. 2,543,793 3/1951 Marks 350/267 3,151,971 10/1964 Clough 75/.5 B 17 Claims, 69 Drawing Figures PATENTEDHUYZO 1975 sum cu or 9 PAIENIEUnmo I975 v 3.773.684 SHEET NM 29 L/6 7 FIG. 43

INVENTOR. 2' 41/5 ,44 w/v M Mazes Fl G. 42 m 424M161 PATENTEU I975 SHEET 160! 29 3.773.684

FEG. 45 w T rraleA a V PATENIED Hm 20 mm SHEET 180F 29 VARIOUS CROSS SECTIONAL AREAS FOR HALF-WAVE DIPOLE Aa+Ab ZOEbMw mmOmo w C. 4mm

RATIO OF RADIATION RESISTANCE TO ABSORPTION RESISTANCE SIM W W mm VM W m M wf M/ C Q PAIENTED IIIIIZO I873 CURVES OF CONSTANT MINIMUM TRANSMISSION RELATIVE TRANSMITTANC E ELECTRIC DICHROIC RATIO I'o 2b 3b MAXIMUM TRANSMITTANCE vs.

ELECTRODICHROIC RATIO FOR CONSTANT MINIMUM TRANSMITTANCE OF 0.0I%, O. I% AND I% lSUF 29 Z CELL CONTAINING A CHROMIUM DIPOLE SUSPENSION VOLTAGE TRACE IKV/ DIV.

TIME (milhseconds) Z CELL CONTAINING A CHROMIUM DIPOLE SUSPENSION 8 VOLTAGE TRACE lKV/DIV TIME (mllllseconds)

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4247175 *Oct 31, 1978Jan 27, 1981Research Frontiers IncorporatedLight valve containing improved light valve suspension
US4270841 *Oct 31, 1978Jun 2, 1981Research Frontiers IncorporatedLight valve containing suspension of perhalide of alkaloid acid salt
US4442019 *Jan 5, 1981Apr 10, 1984Marks Alvin MNon-coagulating conductive particles in dielectric fluid
US4606848 *Aug 14, 1984Aug 19, 1986The United States Of America As Represented By The Secretary Of The ArmyAbsorption, scattering; microwaves
US4663083 *Apr 3, 1984May 5, 1987Marks Alvin MElectro-optical dipole suspension with reflective-absorptive-transmissive characteristics
US4725490 *May 5, 1986Feb 16, 1988Hoechst Celanese CorporationHigh magnetic permeability composites containing fibers with ferrite fill
US4728554 *May 5, 1986Mar 1, 1988Hoechst Celanese CorporationFiber structure and method for obtaining tuned response to high frequency electromagnetic radiation
US4987418 *Dec 28, 1987Jan 22, 1991United Technologies CorporationFerroelectric panel
US4989006 *Oct 17, 1989Jan 29, 1991The United States Of America As Represented By The Secretary Of The Air ForceMicrowave absorption system
US5142418 *Jul 20, 1989Aug 25, 1992The Unites States Of America As Represented By The Secretary Of The Air ForceSuperconducting tunable inorganic filter
US5155634 *Jul 20, 1989Oct 13, 1992The United States Of America As Represented By The Secretary Of The Air ForceSuperconducting reflection filter
US5161068 *Jul 20, 1989Nov 3, 1992The United States Of America As Represented By The Secretary Of The Air ForceSuperconducting searching filter
US5204772 *Nov 26, 1991Apr 20, 1993Nippon Sheet Glass Co., Ltd.Electrically responsive light controlling device
US5270872 *Jul 20, 1989Dec 14, 1993The United States Of America As Represented By The Secretary Of The Air ForceSuperconducting submicron filter
US5345238 *Mar 14, 1990Sep 6, 1994Teledyne Industries, Inc.Satellite signature suppression shield
US5650872 *Jan 13, 1995Jul 22, 1997Research Frontiers IncorporatedLight valve containing ultrafine particles
US5711884 *Nov 21, 1995Jan 27, 1998University Of Pittsburgh Of The Commonwealth System Of Higher EducationMethod of filtering submicron particles with gel lattice membrane filter
US5944994 *Jun 4, 1997Aug 31, 1999University Of Pittsburgh Of The Commonwealth System Of Higher EducationGel membrane filter nin a liquid
US6001251 *Oct 26, 1998Dec 14, 1999University Of PittsburghMaterial for separating submicron particles
US6123845 *Sep 15, 1998Sep 26, 2000University Of PittsburghAdjacent particles are fused together.
US6825655 *Dec 30, 2002Nov 30, 2004Imego AbMeasuring brownian relaxation in carrier fluid under external alternating magnetic field; measuring change in hydrodynamic volume; data processing; blood and urine analysis
US7388549 *Jul 28, 2004Jun 17, 2008Kuo Ching ChiangMulti-band antenna
US7642948 *Aug 12, 2004Jan 5, 2010Ewald Dorken AgReflective layer
US8537295Sep 22, 2009Sep 17, 2013Pilkington Group LimitedMethods of switching and apparatus comprising an electrically actuated variable transmission material
US20100047593 *Dec 21, 2007Feb 25, 2010Osamu HigashidaLight Control Film
WO2005029171A1 *Sep 9, 2004Mar 31, 2005De Boer Dirk K GDisplay device with suspended anisometric particles
WO2010032068A1 *Sep 22, 2009Mar 25, 2010Pilkington Group LimitedSwitchable glazing
WO2010032069A1 *Sep 22, 2009Mar 25, 2010Pilkington Group LimitedMethods of switching and apparatus comprising an electrically actuated variable transmission material
Classifications
U.S. Classification252/583, 516/33, 359/296, 342/6, 342/2
International ClassificationG02F1/17, G02F1/01
Cooperative ClassificationG02F1/172
European ClassificationG02F1/17A