GB1515963A - Crosslinked collagen-mucopolysaccharide composite materials - Google Patents
Crosslinked collagen-mucopolysaccharide composite materialsInfo
- Publication number
- GB1515963A GB1515963A GB2835976A GB2835976A GB1515963A GB 1515963 A GB1515963 A GB 1515963A GB 2835976 A GB2835976 A GB 2835976A GB 2835976 A GB2835976 A GB 2835976A GB 1515963 A GB1515963 A GB 1515963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mucopolysaccharide
- cross
- collagen
- sulphate
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H1/00—Macromolecular products derived from proteins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L17/00—Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
- A61L17/06—At least partially resorbable materials
- A61L17/10—At least partially resorbable materials containing macromolecular materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/22—Polypeptides or derivatives thereof, e.g. degradation products
- A61L27/24—Collagen
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L33/00—Antithrombogenic treatment of surgical articles, e.g. sutures, catheters, prostheses, or of articles for the manipulation or conditioning of blood; Materials for such treatment
- A61L33/0005—Use of materials characterised by their function or physical properties
- A61L33/0011—Anticoagulant, e.g. heparin, platelet aggregation inhibitor, fibrinolytic agent, other than enzymes, attached to the substrate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L33/00—Antithrombogenic treatment of surgical articles, e.g. sutures, catheters, prostheses, or of articles for the manipulation or conditioning of blood; Materials for such treatment
- A61L33/06—Use of macromolecular materials
- A61L33/062—Mixtures of macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0063—Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00365—Proteins; Polypeptides; Degradation products thereof
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Hematology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Dermatology (AREA)
- Biophysics (AREA)
- Vascular Medicine (AREA)
- Molecular Biology (AREA)
- Materials For Medical Uses (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Laminated Bodies (AREA)
- Sealing Material Composition (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
1515963 Cross-linked polymer of collagen and a mucopolysaccharide MASSACHUSETTS INSTITUTE OF TECHNOLOGY 8 July 1976 [15 July 1975] 28359/76 Heading C3H A cross-linked polymer of collagen and a mucopolysaccharide obtained by reacting collagen with the mucopolysaccharide and cross-linking the product is characterized in that the polymer is cross-linked to an Mc value of 800-60,000 and contains at least 0À5% by weight of said mucopolysaccharide irreversibly bound to said collagen. The polymer may be produced by dipping fibres, sheets, films and tubes made of collagen into a solution of mucopolysaccharide. The cross-linking may be achieved with a chemical cross-linking agent, e.g. glutaraldehyde, dehydrothermal crosslinking, or by radiation. The mucopolysaccharide is preferably chondroilin 6-sulphate, chondroitin 4-sulphate, heparin, keratan sulphate, heparan sulphate, dermatan sulphate or hyduronic acid. The cross-linked polymer may be formed into a suture or prosthesis.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59611175A | 1975-07-15 | 1975-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1515963A true GB1515963A (en) | 1978-06-28 |
Family
ID=24386022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2835976A Expired GB1515963A (en) | 1975-07-15 | 1976-07-08 | Crosslinked collagen-mucopolysaccharide composite materials |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5230885A (en) |
CA (1) | CA1087610A (en) |
DE (1) | DE2631908A1 (en) |
FR (1) | FR2318189A1 (en) |
GB (1) | GB1515963A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4378017A (en) | 1980-03-21 | 1983-03-29 | Kureha Kagaku Kogyo Kabushiki Kaisha | Composite material of de-N-acetylated chitin and fibrous collagen |
GB2148901A (en) * | 1983-10-04 | 1985-06-05 | Johnson & Johnson | Protein/polysaccharide complexes |
US4526714A (en) * | 1982-12-13 | 1985-07-02 | Cordis Europa N.V. | Conjugates of anticoagulant and protein |
US4634762A (en) * | 1981-12-15 | 1987-01-06 | Sentron V.O.F. | Conjugates of anticoagulant and protein |
US4678671A (en) * | 1981-12-15 | 1987-07-07 | Cordis Europa N.V. | Conjugates of anticoagulant and protein |
WO1989000413A1 (en) * | 1987-07-20 | 1989-01-26 | Stone Kevin R | Prosthetic meniscus |
WO1990009769A1 (en) * | 1989-03-02 | 1990-09-07 | Regen Corporation | Prosthetic meniscus |
WO1991018558A1 (en) * | 1990-05-29 | 1991-12-12 | Creative Biomolecules, Inc. | Synthetic bone matrix |
US5108438A (en) * | 1989-03-02 | 1992-04-28 | Regen Corporation | Prosthetic intervertebral disc |
US5263984A (en) * | 1987-07-20 | 1993-11-23 | Regen Biologics, Inc. | Prosthetic ligaments |
US5306311A (en) * | 1987-07-20 | 1994-04-26 | Regen Corporation | Prosthetic articular cartilage |
US5681353A (en) * | 1987-07-20 | 1997-10-28 | Regen Biologics, Inc. | Meniscal augmentation device |
US5735902A (en) * | 1987-07-20 | 1998-04-07 | Regen Biologics, Inc. | Hand implant device |
EP1337266A1 (en) * | 2000-10-31 | 2003-08-27 | Orquest, Inc. | Mineralized collagen-polysaccharide matrix for bone and cartilage repair |
WO2006111347A1 (en) | 2005-04-18 | 2006-10-26 | Lohmann & Rauscher Gmbh & Co Kg. | Self-sterilized, antiseptic collagen preparations, their use and method for producing them |
US7309359B2 (en) | 2003-08-21 | 2007-12-18 | Warsaw Orthopedic, Inc. | Allogenic/xenogenic implants and methods for augmenting or repairing intervertebral discs |
CN100457989C (en) * | 2006-11-04 | 2009-02-04 | 青岛大学 | Method for preparing high-strength alginic acid/gelatin cross-blend fiber and its use |
US8118779B2 (en) | 2006-06-30 | 2012-02-21 | Warsaw Orthopedic, Inc. | Collagen delivery device |
US8399619B2 (en) | 2006-06-30 | 2013-03-19 | Warsaw Orthopedic, Inc. | Injectable collagen material |
CN112704768A (en) * | 2020-11-30 | 2021-04-27 | 山东大学 | Chondroitin sulfate modified collagen/polycaprolactone vascular repair stent and preparation method and application thereof |
CN117298327A (en) * | 2023-11-15 | 2023-12-29 | 北京帝康医药投资管理有限公司 | Hemostatic microsphere particles and preparation method and application thereof |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1085524B (en) * | 1977-03-22 | 1985-05-28 | Snam Progetti | BIOCOMPATIBLE POROUS MATERIALS AND FIBERS ABLE TO ENGLISH SUBSTANCES OF BIOLOGICAL INTEREST AND METHODS FOR OBTAINING THEM |
FR2517315B1 (en) * | 1981-11-30 | 1985-12-20 | Tech Cuir Centre | PROCESS FOR THE PREPARATION OF NEW FORMS OF COLLAGEN, NATIVE OR DERETICULATED, WITH PRESERVED HELICOIDAL STRUCTURE, ASSOCIATED WITH MUCOPOLYSACCHARIDES AND THEIR APPLICATIONS IN PARTICULAR IN THE COSMETOLOGICAL, PHARMACEUTICAL, ANALYTICAL AND OTHER FIELDS |
CA1213520A (en) * | 1982-03-17 | 1986-11-04 | Abe Widra | Hydrophilic biopolymeric copolyelectrolytes, and biodegradable dressings comprising same |
JPS58180162A (en) * | 1982-04-19 | 1983-10-21 | 株式会社高研 | Anti-thrombosis medical material |
US4487865A (en) * | 1983-12-15 | 1984-12-11 | Biomatrix, Inc. | Polymeric articles modified with hyaluronate |
US4500676A (en) * | 1983-12-15 | 1985-02-19 | Biomatrix, Inc. | Hyaluronate modified polymeric articles |
JPS60130601A (en) * | 1983-12-15 | 1985-07-12 | バイオマトリツクス,インコ−ポレイテツド | Manufacture of hyaluronic acid water-insoluble composition |
CA1238043A (en) * | 1983-12-15 | 1988-06-14 | Endre A. Balazs | Water insoluble preparations of hyaluronic acid and processes therefor |
US4745098A (en) * | 1984-02-24 | 1988-05-17 | The Regents Of The University Of California | Compositions and method for improving wound healing |
SE442820B (en) * | 1984-06-08 | 1986-02-03 | Pharmacia Ab | GEL OF THE CROSS-BOND HYALURONIC ACID FOR USE AS A GLASS BODY SUBSTITUTE |
SE456346B (en) * | 1984-07-23 | 1988-09-26 | Pharmacia Ab | GEL TO PREVENT ADHESION BETWEEN BODY TISSUE AND SET FOR ITS PREPARATION |
US4582865A (en) * | 1984-12-06 | 1986-04-15 | Biomatrix, Inc. | Cross-linked gels of hyaluronic acid and products containing such gels |
FR2585576B1 (en) * | 1985-07-30 | 1992-01-03 | Bioetica Sa | BONE MATRIX REPLACEMENT PROMOTING OSTEOGENESIS |
EP0246638A3 (en) * | 1986-05-23 | 1989-03-15 | Cordis Corporation | Biologically modified synthetic grafts |
JPH01124465A (en) * | 1987-11-10 | 1989-05-17 | Kanegafuchi Chem Ind Co Ltd | Composition for artificial basement membrane and implantation device with artificial basement membrane |
JPH0622579B2 (en) * | 1988-03-09 | 1994-03-30 | テルモ株式会社 | Cell invasive medical materials |
US5292362A (en) * | 1990-07-27 | 1994-03-08 | The Trustees Of Columbia University In The City Of New York | Tissue bonding and sealing composition and method of using the same |
US5990096A (en) * | 1990-09-18 | 1999-11-23 | Hyal Pharmaceutical Corporation | Formulations containing hyaluronic acid |
US5824658A (en) * | 1990-09-18 | 1998-10-20 | Hyal Pharmaceutical Corporation | Topical composition containing hyaluronic acid and NSAIDS |
US5910489A (en) * | 1990-09-18 | 1999-06-08 | Hyal Pharmaceutical Corporation | Topical composition containing hyaluronic acid and NSAIDS |
CA2061703C (en) * | 1992-02-20 | 2002-07-02 | Rudolf E. Falk | Formulations containing hyaluronic acid |
US5977088A (en) * | 1991-07-03 | 1999-11-02 | Hyal Pharmaceutical Corporation | Formulations containing hyaluronic acid |
US6103704A (en) * | 1991-07-03 | 2000-08-15 | Hyal Pharmaceutical Corporation | Therapeutic methods using hyaluronic acid |
US5792753A (en) * | 1991-07-03 | 1998-08-11 | Hyal Pharmaceutical Corporation | Compositions comprising hyaluronic acid and prostaglandin-synthesis-inhibiting drugs |
US6218373B1 (en) | 1992-02-20 | 2001-04-17 | Hyal Pharmaceutical Corporation | Formulations containing hyaluronic acid |
US5767106A (en) * | 1992-02-21 | 1998-06-16 | Hyal Pharmaceutical Corporation | Treatment of disease and conditions associated with macrophage infiltration |
DE4425776C2 (en) * | 1994-07-13 | 2002-08-29 | Britta Hofmann | Process for the preparation of an improved collagen graft with a loosened structure |
AU700584C (en) * | 1994-08-12 | 2002-03-28 | Meadox Medicals, Inc. | Vascular graft impregnated with a heparin-containing collagen sealant |
DE19630879A1 (en) * | 1996-07-31 | 1998-02-05 | Hanno Lutz Prof Dr Baumann | Production of blood-compatible material, for implants, containers etc. |
ATE435668T1 (en) | 2004-04-15 | 2009-07-15 | Nexilis Ag | OSTEOGENIC MATRIX COMPOSITE, METHOD FOR THE PRODUCTION THEREOF AND IMPLANT AND SCAFFOLD FOR TISSUE ENGINEERING WITH A COATING MADE OF AN OSTEOGENIC MATRIX COMPOSITE |
CN103301510B (en) * | 2013-06-20 | 2014-12-24 | 孙文善 | Acupuncture implantation material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1491218C3 (en) * | 1963-06-15 | 1973-01-04 | Spofa Sdruzheni Podniku Pro Zdravotnickou Vyrobu, Prag | Blood vessel prosthesis and method for making the same |
US3527225A (en) * | 1964-09-29 | 1970-09-08 | David F Smith | Resorbable surgical sutures from fibrous proteins |
FR2236539A1 (en) * | 1973-07-13 | 1975-02-07 | Ladialas Robert | Biological polymeric membrane prepn. - by depolymerising elastin and then, copolymerising the peptides with gelatin, collagen etc. |
-
1976
- 1976-07-08 GB GB2835976A patent/GB1515963A/en not_active Expired
- 1976-07-12 JP JP51082872A patent/JPS5230885A/en active Granted
- 1976-07-14 CA CA256,978A patent/CA1087610A/en not_active Expired
- 1976-07-15 DE DE19762631908 patent/DE2631908A1/en active Granted
- 1976-07-15 FR FR7621653A patent/FR2318189A1/en active Granted
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4378017A (en) | 1980-03-21 | 1983-03-29 | Kureha Kagaku Kogyo Kabushiki Kaisha | Composite material of de-N-acetylated chitin and fibrous collagen |
US4634762A (en) * | 1981-12-15 | 1987-01-06 | Sentron V.O.F. | Conjugates of anticoagulant and protein |
US4678671A (en) * | 1981-12-15 | 1987-07-07 | Cordis Europa N.V. | Conjugates of anticoagulant and protein |
US4526714A (en) * | 1982-12-13 | 1985-07-02 | Cordis Europa N.V. | Conjugates of anticoagulant and protein |
GB2148901A (en) * | 1983-10-04 | 1985-06-05 | Johnson & Johnson | Protein/polysaccharide complexes |
US4880429A (en) * | 1987-07-20 | 1989-11-14 | Stone Kevin R | Prosthetic meniscus |
US5735902A (en) * | 1987-07-20 | 1998-04-07 | Regen Biologics, Inc. | Hand implant device |
WO1989000413A1 (en) * | 1987-07-20 | 1989-01-26 | Stone Kevin R | Prosthetic meniscus |
US5007934A (en) * | 1987-07-20 | 1991-04-16 | Regen Corporation | Prosthetic meniscus |
US6042610A (en) * | 1987-07-20 | 2000-03-28 | Regen Biologics, Inc. | Meniscal augmentation device |
US5735903A (en) * | 1987-07-20 | 1998-04-07 | Li; Shu-Tung | Meniscal augmentation device |
US5263984A (en) * | 1987-07-20 | 1993-11-23 | Regen Biologics, Inc. | Prosthetic ligaments |
US5306311A (en) * | 1987-07-20 | 1994-04-26 | Regen Corporation | Prosthetic articular cartilage |
US5624463A (en) * | 1987-07-20 | 1997-04-29 | Regen Biologics, Inc. | Prosthetic articular cartilage |
US5681353A (en) * | 1987-07-20 | 1997-10-28 | Regen Biologics, Inc. | Meniscal augmentation device |
WO1990009769A1 (en) * | 1989-03-02 | 1990-09-07 | Regen Corporation | Prosthetic meniscus |
US5108438A (en) * | 1989-03-02 | 1992-04-28 | Regen Corporation | Prosthetic intervertebral disc |
WO1991018558A1 (en) * | 1990-05-29 | 1991-12-12 | Creative Biomolecules, Inc. | Synthetic bone matrix |
US6468308B1 (en) | 1990-05-29 | 2002-10-22 | Stryker Corporation | Synthetic bone matrix |
US6605117B2 (en) | 1990-05-29 | 2003-08-12 | Stryker Corporation | Synthetic bone matrix |
EP1337266A4 (en) * | 2000-10-31 | 2006-11-02 | Depuy Spine Inc | Mineralized collagen-polysaccharide matrix for bone and cartilage repair |
EP1337266A1 (en) * | 2000-10-31 | 2003-08-27 | Orquest, Inc. | Mineralized collagen-polysaccharide matrix for bone and cartilage repair |
US7309359B2 (en) | 2003-08-21 | 2007-12-18 | Warsaw Orthopedic, Inc. | Allogenic/xenogenic implants and methods for augmenting or repairing intervertebral discs |
US9011543B2 (en) | 2003-08-21 | 2015-04-21 | Warsaw Orthopedic, Inc. | Methods for augmenting or repairing intervertebral discs with allogenic/xenogenic implants |
WO2006111347A1 (en) | 2005-04-18 | 2006-10-26 | Lohmann & Rauscher Gmbh & Co Kg. | Self-sterilized, antiseptic collagen preparations, their use and method for producing them |
US7956094B2 (en) | 2005-04-18 | 2011-06-07 | Lohmann & Rauscher Gmbh & Co. Kg | Self-sterilized, antiseptic collagen preparations, their use and methods for producing them |
US8118779B2 (en) | 2006-06-30 | 2012-02-21 | Warsaw Orthopedic, Inc. | Collagen delivery device |
US8399619B2 (en) | 2006-06-30 | 2013-03-19 | Warsaw Orthopedic, Inc. | Injectable collagen material |
CN100457989C (en) * | 2006-11-04 | 2009-02-04 | 青岛大学 | Method for preparing high-strength alginic acid/gelatin cross-blend fiber and its use |
CN112704768A (en) * | 2020-11-30 | 2021-04-27 | 山东大学 | Chondroitin sulfate modified collagen/polycaprolactone vascular repair stent and preparation method and application thereof |
CN117298327A (en) * | 2023-11-15 | 2023-12-29 | 北京帝康医药投资管理有限公司 | Hemostatic microsphere particles and preparation method and application thereof |
Also Published As
Publication number | Publication date |
---|---|
FR2318189A1 (en) | 1977-02-11 |
JPS543779B2 (en) | 1979-02-27 |
FR2318189B1 (en) | 1980-08-01 |
DE2631908A1 (en) | 1977-02-10 |
DE2631908C2 (en) | 1988-10-20 |
JPS5230885A (en) | 1977-03-08 |
CA1087610A (en) | 1980-10-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19960707 |