Patent US5298255A successfully refreshed from Google Patents.
US5298255A
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Antithrombic medical material, artificial internal organ, and method for production of antithrombic medical material
Assignee: Terumo Corp
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Filing: 1991-08-14
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Granted: 1994-03-29
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Expires: 2011-08-14
Abstract
Abstract An antithrombic medical material, having superposed on the surface of a substrate formed of a polymer material a polymerized protein substantially free at least from erythrocyte and leukocyte, a medical device using the same, and a method for production of the antithrombic medical material.
Inventors
- 👤 Jiro Sawamoto
- 👤 Yoshihito Takano
- 👤 Yuzo Ezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:17
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/06; A61L33/12; A61L33/126; A61L27/00; A61L27/28; A61L27/34; A61L29/00; A61L29/08; A61L29/085
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
An antithrombic medical material which comprises a polymeric substrate, and a fibrin layer, the surface of which has been hydrolyzed by plasmin and is on the surface of said substrate.
Claim 2
Dependent Claim
30 words
An antithrombic medical material which comprises a polymeric substrate, and a fibrin layer, the surface of which has been hydrolyzed by plasmin and is on the surface of said substrate.
Claim 3
Dependent Claim
13 words
The material according to claim 1, wherein said substrate is a porous substrate.
Claim 4
Dependent Claim
45 words
A medical device which is comprised of an antithrombic material which comprises a polymeric substrate and a fibrin layer, the surface of which has been hydrolyzed by plasmin and is on the surface of said substrate and which is substantially free of erythrocyte and leukocytes.
Claim 5
Dependent Claim
45 words
A medical device which is comprised of an antithrombic material which comprises a polymeric substrate and a fibrin layer, the surface of which has been hydrolyzed by plasmin and is on the surface of said substrate and which is substantially free of erythrocyte and leukocytes.
Claim 6
Dependent Claim
31 words
The medical device of claim 3, wherein said fibrin layer is positioned on the surface of the medical device which will come into intimate contact with blood upon in vivo implantation.
Claim 7
Dependent Claim
15 words
The medical device of claim 3, wherein said medical device is an artificial blood vessel.
Claim 8
Dependent Claim
13 words
The medical device of claim 3, wherein said medical device is a catheter.
Claim 9
Dependent Claim
15 words
The medical device of claim 3, wherein said medical device is an artificial internal organ.
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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) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |