Patent US4833200A successfully refreshed from Google Patents.
US4833200A
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Antithrombogenic medical material and method of preparing same
Assignee: Koken Co Ltd
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Filing: 1986-07-25
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Granted: 1989-05-23
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Expires: 2006-07-25
Abstract
Abstract An antithrombogenic medical material with a remarkable antithrombogenic property and histocompatibility as well as sufficient physical strength, formed by fixing a heparinized collagen to a synthetic polymer material is provided. And a method of preparing an antithrombogenic medical material is provided, wherein a synthetic polymer material is subjected to a coating or impregnating treatment with a collagen-containing solution, followed by heparinization of the collagen, and the heparinized collagen is fixed to the synthetic polymer material. This method allows manufacturing of antithrombogenic medical material with ease.
Inventors
- 👤 Yasuharu Noishiki
- 👤 Teruo Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:38
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/0005; A61L33/0011; A61L33/0029; C; C08; C08L; C08L5/00; C08L5/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A method of preparing an antithrombogenic medical material consisting essentially of impregnating or coating a synthetic polymer material with a collagen by contacting the synthetic polymer material with a solution or a dispersion containing the collggen, drying the collagen impregnated or coated synthetic polymer material, treating the dried collagen impregnated or coated synthetic polymer material with a protamine and a cross-linking agent to cross-link the protamine to the collagen, and treating the cross-linked collagen and protamine impregnated or coated synthetic polymer material with a solution containing heparin, whereby the heparin is ionically bound to the protamine.
Claim 2
Independent Claim
96 words
A method of preparing an antithrombogenic medical material consisting essentially of impregnating or coating a synthetic polymer material with a collagen by contacting the synthetic polymer material with a solution or a dispersion containing the collggen, drying the collagen impregnated or coated synthetic polymer material, treating the dried collagen impregnated or coated synthetic polymer material with a protamine and a cross-linking agent to cross-link the protamine to the collagen, and treating the cross-linked collagen and protamine impregnated or coated synthetic polymer material with a solution containing heparin, whereby the heparin is ionically bound to the protamine.
Claim 3
Independent Claim
103 words
A method of preparing an antithrombogenic medical material, consisting essentially of impregnating or coating a synthetic polymer material with a collagen and a protamine by contacting the synthetic polymer material with a solution or a dispersion containing the collagen and the protamine, drying the collagen and protamine impregnated or coated synthetic polymer material, treating the dried collagen and protamine impregnated or coated synthetic polymer material with a cross-linking agent to cross-link the protamine to the collagen, and treating the cross-linked collagen and protamine impregnated or coated synthetic polymer material with a solution containing heparin, whereby the heparin is ionically bound to the protamine.
Claim 4
Independent Claim
103 words
A method of preparing an antithrombogenic medical material, consisting essentially of impregnating or coating a synthetic polymer material with a collagen and a protamine by contacting the synthetic polymer material with a solution or a dispersion containing the collagen and the protamine, drying the collagen and protamine impregnated or coated synthetic polymer material, treating the dried collagen and protamine impregnated or coated synthetic polymer material with a cross-linking agent to cross-link the protamine to the collagen, and treating the cross-linked collagen and protamine impregnated or coated synthetic polymer material with a solution containing heparin, whereby the heparin is ionically bound to the protamine.
Claim 5
Independent Claim
90 words
A method of preparing an antithrombogenic medical material, consisting essentially of impregnating or coating a synthetic polymer material with a collagen, a protamine and heparin by coating the synthetic polymer material with a solution or a dispersion containing the collagen, the protamine and heparin, drying the collagen, protamine and heparin impregnated or coated synthetic polymer material, and treating the dried collagen, protamine and heparin impregnated or coated synthetic polymer material, wherein the heparin is ionically bound to the protamine, with a cross-linking agent to cross-link the protamine to the collagen.
Claim 6
Independent Claim
90 words
A method of preparing an antithrombogenic medical material, consisting essentially of impregnating or coating a synthetic polymer material with a collagen, a protamine and heparin by coating the synthetic polymer material with a solution or a dispersion containing the collagen, the protamine and heparin, drying the collagen, protamine and heparin impregnated or coated synthetic polymer material, and treating the dried collagen, protamine and heparin impregnated or coated synthetic polymer material, wherein the heparin is ionically bound to the protamine, with a cross-linking agent to cross-link the protamine to the collagen.
Claim 7
Independent Claim
41 words
A method according to any one of claims 1, 2 or 3, wherein the synthetic polymer material is at least one member selected from the group consisting of a polyurethane, polyvinyl chloride, polyvinyl chloride copolymer, polyester, fluororesin, polycarbonate, polystyrene, and polyethylene.
Claim 8
Independent Claim
37 words
A method according to any one of claims 1, 2 or 3, wherein the synthetic polymer material is at least one member selected from the group consisting of a membrane, or a woven, knitted, or porous tube.
Claim 9
Independent Claim
33 words
A method according to any one of claims 1, 2 or 3, wherein the cross-linking agent is at least one member selected from the group consisting of hexamethylene diisocyanate, tolylene diisocyanate, and glutaraldehyde.
Claim 10
Independent Claim
31 words
A method according to any one of claims 1, 2 or 3, wherein the protamine is at least one member selected from the group consisting of protamine sulfate and protamine hydrochloride.
References Cited (Backward Citations)
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |