DE69126766D1 - Verfahren zur Herstellung von Polymerteilchen - Google Patents

Verfahren zur Herstellung von Polymerteilchen

Info

Publication number
DE69126766D1
DE69126766D1 DE69126766T DE69126766T DE69126766D1 DE 69126766 D1 DE69126766 D1 DE 69126766D1 DE 69126766 T DE69126766 T DE 69126766T DE 69126766 T DE69126766 T DE 69126766T DE 69126766 D1 DE69126766 D1 DE 69126766D1
Authority
DE
Germany
Prior art keywords
production
polymer particles
particles
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69126766T
Other languages
English (en)
Other versions
DE69126766T2 (de
Inventor
John Kennedy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United States Surgical Corp
Original Assignee
United States Surgical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United States Surgical Corp filed Critical United States Surgical Corp
Publication of DE69126766D1 publication Critical patent/DE69126766D1/de
Application granted granted Critical
Publication of DE69126766T2 publication Critical patent/DE69126766T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00Processes of treating or compounding macromolecular substances
    • C08J3/12Powdering or granulating
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/28Bones
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14Macromolecular materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14Macromolecular materials
    • A61L27/18Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00Making granules
    • B29B9/10Making granules by moulding the material, i.e. treating it in the molten state
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18Homopolymers or copolymers or tetrafluoroethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02Polyesters derived from dicarboxylic acids and dihydroxy compounds
DE69126766T 1990-11-27 1991-11-27 Verfahren zur Herstellung von Polymerteilchen Expired - Lifetime DE69126766T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/618,652 US5342557A (en) 1990-11-27 1990-11-27 Process for preparing polymer particles

Publications (2)

Publication Number Publication Date
DE69126766D1 true DE69126766D1 (de) 1997-08-14
DE69126766T2 DE69126766T2 (de) 1998-01-02

Family

ID=24478573

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69126766T Expired - Lifetime DE69126766T2 (de) 1990-11-27 1991-11-27 Verfahren zur Herstellung von Polymerteilchen

Country Status (4)

Country Link
US (1) US5342557A (de)
EP (1) EP0488218B1 (de)
CA (1) CA2056055A1 (de)
DE (1) DE69126766T2 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5342557A (en) * 1990-11-27 1994-08-30 United States Surgical Corporation Process for preparing polymer particles
US5143662A (en) * 1991-02-12 1992-09-01 United States Surgical Corporation Process for preparing particles of bioabsorbable polymer
US5366756A (en) * 1992-06-15 1994-11-22 United States Surgical Corporation Method for treating bioabsorbable implant material
US5599852A (en) * 1994-10-18 1997-02-04 Ethicon, Inc. Injectable microdispersions for soft tissue repair and augmentation
JP3483753B2 (ja) * 1997-12-29 2004-01-06 タキロン株式会社 生体内分解吸収性可塑性粘着物
AU782328B2 (en) * 1999-04-16 2005-07-21 Takiron Co. Ltd. Bioresorbable polymeric clayey and sticky substance
US6287499B1 (en) 1998-10-09 2001-09-11 United States Surgical Corporation Process of making bioabsorbable block copolymer filaments
JP2001064400A (ja) * 1999-06-22 2001-03-13 Mitsui Chemicals Inc ポリヒドロキシカルボン酸の製造方法
US9080146B2 (en) 2001-01-11 2015-07-14 Celonova Biosciences, Inc. Substrates containing polyphosphazene as matrices and substrates containing polyphosphazene with a micro-structured surface
US8545386B2 (en) * 2003-08-14 2013-10-01 Boston Scientific Scimed, Inc. Surgical slings
WO2005016184A1 (en) 2003-08-14 2005-02-24 Scimed Life System, Inc. Surgical slings
US20210299056A9 (en) 2004-10-25 2021-09-30 Varian Medical Systems, Inc. Color-Coded Polymeric Particles of Predetermined Size for Therapeutic and/or Diagnostic Applications and Related Methods
US9107850B2 (en) 2004-10-25 2015-08-18 Celonova Biosciences, Inc. Color-coded and sized loadable polymeric particles for therapeutic and/or diagnostic applications and methods of preparing and using the same
JP4885866B2 (ja) 2004-10-25 2012-02-29 セロノヴァ バイオサイエンスィズ ジャーマニー ゲーエムベーハー 治療適用および/または診断適用のための充填可能なポリホスファゼン含有粒子、ならびにその調製方法および使用方法
US9114162B2 (en) 2004-10-25 2015-08-25 Celonova Biosciences, Inc. Loadable polymeric particles for enhanced imaging in clinical applications and methods of preparing and using the same
US7776995B2 (en) * 2005-04-27 2010-08-17 Mitsubishi Chemical Corporation Process for production of polyester particles, polyester particles, polyester resin particles, and process for production thereof
DE102005053695B4 (de) * 2005-11-10 2008-04-30 Airbus Deutschland Gmbh Verfahren zum Handhaben einer Flüssigkeit
US20080075777A1 (en) * 2006-07-31 2008-03-27 Kennedy Michael T Apparatus and methods for preparing solid particles
DE102006056119A1 (de) * 2006-11-14 2008-05-15 Linde Ag Vorrichtung zur Partikelerzeugung
EP1923188A1 (de) * 2006-11-14 2008-05-21 Linde Aktiengesellschaft Vorrichtung und Verfahren zur Partikelerzeugung
US8735504B2 (en) * 2012-05-02 2014-05-27 Warsaw Orthopedic, Inc. Methods for preparing polymers having low residual monomer content
KR101762996B1 (ko) 2013-08-29 2017-07-28 (주)엘지하우시스 발포 시트용 발포성 수지 조성물, 발포 시트, 입자상의 폴리락트산 수지의 제조 방법 및 발포 시트의 제조 방법
KR101501217B1 (ko) * 2014-07-17 2015-03-10 최명 필러용 폴리디옥사논 입자의 제조방법

Family Cites Families (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL27947A (en) * 1967-05-09 1972-07-26 Weitzman J Method for the production of thermoplastic resin particles and of mixtures of such particles with additives
DE1920777C3 (de) * 1969-04-24 1978-08-24 Basf Ag, 6700 Ludwigshafen Verfahren und Vorrichtung zur Herstellung von Thermoplastpulvern
DE2032712C3 (de) * 1970-07-02 1978-10-19 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von w-Amino-alkanphosphonsäure bzw.- phosphinsäurederivaten
US3741703A (en) * 1971-04-26 1973-06-26 Lilly Industries Ltd An apparatus for making spherical granules
US3743464A (en) * 1971-08-24 1973-07-03 Fmc Corp Continuous sphering apparatus
DE2320373B2 (de) * 1973-04-21 1978-04-06 Merck Patent Gmbh, 6100 Darmstadt Antibioticahaltiges Mittel und seine Verwendung als chirurgisches Kunststoffmaterial
NL7509293A (nl) * 1975-08-05 1977-02-08 Stamicarbon Inrichting voor het bereiden van polymeren met een brede molecuulgewichtsverdeling.
US3981957A (en) * 1975-08-06 1976-09-21 Exxon Research And Engineering Company Process for preparing finely divided polymers
US4256677A (en) * 1976-04-12 1981-03-17 Magnavox Government And Industrial Electronics Co. Apparatus and method for making small spheres
US4186448A (en) * 1976-04-16 1980-02-05 Brekke John H Device and method for treating and healing a newly created bone void
US4100236A (en) * 1976-11-16 1978-07-11 The Continental Group, Inc. Method of preparing micron size particles of solid polymers
US4165420A (en) * 1977-11-10 1979-08-21 The Goodyear Tire & Rubber Company Solid state polymerization of polyester prepolymer
JPS5523711A (en) * 1978-07-29 1980-02-20 Sony Corp Rotary electric machine
US4200601A (en) * 1978-08-17 1980-04-29 National Distillers And Chemical Corporation Process of preparing finely divided polyolefin resins
JPS5940054B2 (ja) * 1978-08-29 1984-09-27 株式会社佐藤技術研究所 融体から特定サイズの球形粒子を製造する方法
US4384975A (en) * 1980-06-13 1983-05-24 Sandoz, Inc. Process for preparation of microspheres
US4933105A (en) * 1980-06-13 1990-06-12 Sandoz Pharm. Corp. Process for preparation of microspheres
US4329304A (en) * 1980-11-10 1982-05-11 National Distillers & Chemical Corp. Process for the preparation of finely divided thermoplastic resin
US4336210A (en) * 1980-11-10 1982-06-22 National Distillers & Chemical Corp. Process for the preparation of finely divided thermoplastic resin
US4340550A (en) * 1980-11-24 1982-07-20 E. I. Du Pont De Nemours And Company Oligomer pellets of ethylene terephthalate
US4436782A (en) * 1980-11-24 1984-03-13 E. I. Du Pont De Nemours And Company Oligomer pellets of ethylene terephthalate
IE52535B1 (en) * 1981-02-16 1987-12-09 Ici Plc Continuous release pharmaceutical compositions
DE3128872A1 (de) * 1981-07-22 1983-02-10 Basf Ag, 6700 Ludwigshafen Verfahren zur reproduzierbaren herstellung von formteilchen unterschiedlicher geometrie aus polymerdispersionen, schmelzen oder loesungen
US4430451A (en) * 1982-03-03 1984-02-07 The United States Of America As Represented By The United States Department Of Energy Low density, microcellular foams, preparation, and articles
US4535485A (en) * 1982-03-12 1985-08-20 Medical Biological Sciences, Inc. Polymeric acrylic prothesis
US4547390A (en) * 1982-03-12 1985-10-15 Medical Biological Sciences, Inc. Process of making implantable prosthesis material of modified polymeric acrylic (PMMA) beads coated with PHEMA and barium sulfate
GB2121203B (en) * 1982-04-06 1985-10-16 Canon Kk Making toner particles
US4523591A (en) * 1982-10-22 1985-06-18 Kaplan Donald S Polymers for injection molding of absorbable surgical devices
FR2537980B1 (fr) * 1982-12-17 1986-12-19 Sandoz Sa Derives d'acides hydroxycarboxyliques oligomeres, leur preparation et leur utilisation
US4734227A (en) * 1983-09-01 1988-03-29 Battelle Memorial Institute Method of making supercritical fluid molecular spray films, powder and fibers
CH661206A5 (fr) * 1983-09-23 1987-07-15 Debiopharm Sa Procede pour la preparation d'un medicament destine au traitement de maladies hormonodependantes.
JPS6090229A (ja) * 1983-10-24 1985-05-21 Japan Styrene Paper Co Ltd ポリエチレン系樹脂発泡粒子
JPS60155245A (ja) * 1984-01-24 1985-08-15 Daicel Chem Ind Ltd 酢酸セルロ−ス多孔質球状粒子及びその製造方法
US4675140A (en) * 1984-05-18 1987-06-23 Washington University Technology Associates Method for coating particles or liquid droplets
US4578502A (en) * 1985-01-22 1986-03-25 Cudmore Warner J G Polyethylene terephthalate saponification process
US4643735A (en) * 1985-02-27 1987-02-17 Hayes Separation, Inc. Repair material for use with bones
US4693986A (en) * 1985-06-25 1987-09-15 Orthomatrix, Inc. Ceramic process and products
SE459005B (sv) * 1985-07-12 1989-05-29 Aake Rikard Lindahl Saett att framstaella sfaeriska polymerpartiklar
US4673695A (en) * 1985-10-08 1987-06-16 The United States Of America As Represented By The United States Department Of Energy Low density microcellular foams
US4701289A (en) * 1985-11-08 1987-10-20 Dow Corning Corporation Method and apparatus for the rapid solidification of molten material in particulate form
US4648820A (en) * 1985-11-14 1987-03-10 Dresser Industries, Inc. Apparatus for producing rapidly quenched metal particles
US5019302A (en) * 1986-03-12 1991-05-28 Washington University Technology Associates, Inc. Method for granulation
JPS62223112A (ja) * 1986-03-25 1987-10-01 Rooto Seiyaku Kk 歯周病治療剤
US5160745A (en) * 1986-05-16 1992-11-03 The University Of Kentucky Research Foundation Biodegradable microspheres as a carrier for macromolecules
DE3787700T3 (de) * 1986-10-29 1998-12-24 Kanegafuchi Chemical Ind Gleichförmige Polymerteilchen.
DE3751254D1 (de) * 1986-10-31 1995-05-24 Nippon Zeon Co Wundverband.
DE3644588C1 (de) * 1986-12-27 1988-03-10 Ethicon Gmbh Implantat und Verfahren zu seiner Herstellung
CA1321048C (en) * 1987-03-05 1993-08-10 Robert W. J. Lencki Microspheres and method of producing same
DE3708916A1 (de) * 1987-03-19 1988-09-29 Boehringer Ingelheim Kg Verfahren zur reinigung resorbierbarer polyester
US5047180A (en) * 1987-07-24 1991-09-10 Hoechst Celanese Corporation Process for making cellulose ester microparticles
FR2623402B1 (fr) * 1987-11-19 1994-04-29 Solvay Article en polymere d'acide lactique utilisable notamment comme prothese biodegradable et procede pour sa realisation
US5047450A (en) * 1988-04-05 1991-09-10 Phillips Petroleum Company Polyethylene terephthalate molding resin blends
US4940734A (en) * 1988-11-23 1990-07-10 American Cyanamid Process for the preparation of porous polymer beads
US5128114A (en) * 1989-04-14 1992-07-07 E. I. Du Pont De Nemours And Company Silica microspheres, method of improving attrition resistance
US5019400A (en) * 1989-05-01 1991-05-28 Enzytech, Inc. Very low temperature casting of controlled release microspheres
DE3931417A1 (de) * 1989-09-21 1991-04-04 Bayer Ag Rutilmischphasenpigment-mikrogranulate, verfahren zu ihrer herstellung sowie deren verwendung
US5080994A (en) * 1989-10-23 1992-01-14 Xerox Corporation Processes for the preparation of particles
US5102983A (en) * 1990-04-02 1992-04-07 United States Surgical Corporation Process for preparing foamed, bioabsorbable polymer particles
GB9014646D0 (en) * 1990-07-02 1990-08-22 Courtaulds Coatings Holdings Coating compositions
US5342557A (en) * 1990-11-27 1994-08-30 United States Surgical Corporation Process for preparing polymer particles
US5143662A (en) * 1991-02-12 1992-09-01 United States Surgical Corporation Process for preparing particles of bioabsorbable polymer

Also Published As

Publication number Publication date
DE69126766T2 (de) 1998-01-02
US5342557A (en) 1994-08-30
CA2056055A1 (en) 1992-05-28
EP0488218B1 (de) 1997-07-09
EP0488218A2 (de) 1992-06-03
EP0488218A3 (en) 1992-08-12

Similar Documents

Publication Publication Date Title
DE69219046D1 (de) Verfahren zur Herstellung von vernetzten Polymerpartikeln
DE69129673T2 (de) Verfahren zur Herstellung von Polyolefinen
DE69126766D1 (de) Verfahren zur Herstellung von Polymerteilchen
DE59107151D1 (de) Verfahren zur Herstellung von Polyisobuten
DE59108655D1 (de) Verfahren zur Herstellung von Celluloseformkörpern
DE69015391T2 (de) Verfahren zur Herstellung von Kunststoffteilchen.
DE3888564T2 (de) Verfahren zur Herstellung von vernetzten Polymerteilchen.
DE69116828T2 (de) Verfahren zur Herstellung von Zellstoff
DE69317609T2 (de) Verfahren zur Herstellung von Polymerpartikeln von unregelmässiger Form
DE69127422T3 (de) Verfahren zur Herstellung von hohlen feinen Teilchen
DE69028164T2 (de) Verfahren zur Herstellung von Polymerteilchen
DE69106162T2 (de) Verfahren zur Herstellung von nichthaftenden Gummipartikeln.
DE69501311D1 (de) Verfahren zur Herstellung von Polymerpartikeln
DE69123118D1 (de) Verfahren zur Herstellung von Blockpolymeren
DE69133173D1 (de) Verfahren zur Herstellung von Knollen
DE69316702D1 (de) Verfahren zur Herstellung von Polymerpartikeln mit Unregelmässiger Form
DE69027884D1 (de) Verfahren zur Herstellung von expansionsfähigen thermoplastischen Polymerteilchen
DE69411125D1 (de) Verfahren zur Herstellung von Polymer-Partikeln
DE3886860T2 (de) Verfahren zur Herstellung von Polymerteilchen gleicher Grösse.
DE69114528D1 (de) Verfahren zur Herstellung von vernetzten Teilchen.
DE69226042D1 (de) Verfahren zur Herstellung von Polymeren
DE69207486T2 (de) Verfahren zur Herstellung von Polymeren
DE69029373D1 (de) Verfahren zur Herstellung von Organohalogensilanen
DE69402663T2 (de) Verfahren zur Herstellung von Polymerpartikeln
DE69027076T2 (de) Verfahren zur Herstellung von Levoglukosenon

Legal Events

Date Code Title Description
8364 No opposition during term of opposition