Patent US3927275A successfully refreshed from Google Patents.
US4743258A
Expired / Lapsed
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Polymer materials for vascular prostheses
Assignee: JMS Co Ltd
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Filing: 1985-04-12
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Granted: 1988-05-10
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Expires: 2005-04-12
Abstract
Abstract A highly blood-compatible material comprising a polymeric base material and water-soluble and substantially nonionic polymer(s) directly attached to the surface of the base material in an amount of 1 to 100 μg/cm 2 . The polymeric base material is preferably in the form of a web and composed of polyurethane, ethylene/vinyl acetate copolymer or polyvinylchloride. In addition, the attached polymers may be selected from the group consisting of acrylamide polymers, polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, and dextran. This material is particularly useful for preparing vascular prosthesis of small diameters.
Inventors
- 👤 Yoshito Ikada
- 👤 Hiroo Iwata
- 👤 Masakazu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L33/00; A61L33/0076; A61L33/0088; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A material for vascular prostheses which comprises a polymeric web as a base material and one or more water-soluble and substantially nonionic polymers attached to the surface by graft polymerization or chemical reaction with a reactive group of said surface of said base material in an amount of from 1 to 100 μg/cm 2 , whereby IgG protein adsorbed to the surface is less than 0.4 μg/cm 2 .
Claim 2
Dependent Claim
69 words
A material for vascular prostheses which comprises a polymeric web as a base material and one or more water-soluble and substantially nonionic polymers attached to the surface by graft polymerization or chemical reaction with a reactive group of said surface of said base material in an amount of from 1 to 100 μg/cm 2 , whereby IgG protein adsorbed to the surface is less than 0.4 μg/cm 2 .
Claim 3
Dependent Claim
28 words
A material according to claim 1 wherein said polymeric web is prepared from a polymer selected from the group consisting of polyurethane, ethylene/vinyl acetate copolymer and polyvinyl chloride.
Claim 4
Dependent Claim
21 words
A material according to claim 1, wherein said polymers are attached in an amount of 1 to 50 μg/cm 2 .
Claim 5
Dependent Claim
26 words
A material according to claim 1, wherein said polymers are selected from the group consisting of polyacrylamide, polydimethylacrylamide, polymethacrylamide, polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol and dextran.
Claim 6
Dependent Claim
21 words
A material according to claim 4, wherein said polymers are selected from the group consisting of polyacrylamide, polyvinylpyrrolidone and polyvinyl alcohol.
Claim 7
Dependent Claim
12 words
A material according to claim 1, wherein said base material is porous.
Claim 8
Dependent Claim
17 words
A material according to claim 1, wherein said base material is in the form of a tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |