Patent US4878907A successfully refreshed from Google Patents.
US4878907A
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Synthetic vascular prosthesis
Assignee: JMS Co Ltd
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Filing: 1987-11-06
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Granted: 1989-11-07
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Expires: 2007-11-06
Abstract
Abstract A synthetic vascular prosthesis comprises a hollow tubular base member having a multitude of continuous pores and formed of an elastomer material, and a hydrogel layer formed on the inner surface of the base member. The hydrogel layer is partly embedded in the inner portion of the base member at the pores, thereby permitting anchoring adhesion between the hydrogel layer and the base member. A method for manufacturing the synthetic vascular prosthesis is also disclosed, in which the formation of pores in the base member is effected by two separate steps and the hydrogel layer is formed after formation of an inner porous portion of the base member.
Inventors
- 👤 Masao Okada
- 👤 Kazuhiko Sakai
- 👤 Haruo Kimura
- 👤 Yoshito Ikada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:06
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L27/14; A61L27/16; A61L27/28; A61L27/34; A61L27/507; A61L27/52; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A synthetic vascular prosthesis having a compliance close to that of a natural blood vessel, consisting essentially of: a hollow tubular base member formed of an elastomer material and having formed throughout a wall thereof a multitude of continuous pores; and a hydrogel layer formed on the inner surface of said base member, the outer portion of said hydrogel layer being partially embedded in the inner portion of said base member at said pores to thereby achieve anchoring adhesion between said hydrogel layer and said base member, and said hydrogel layer having a smooth inner surface.
Claim 2
Dependent Claim
96 words
A synthetic vascular prosthesis having a compliance close to that of a natural blood vessel, consisting essentially of: a hollow tubular base member formed of an elastomer material and having formed throughout a wall thereof a multitude of continuous pores; and a hydrogel layer formed on the inner surface of said base member, the outer portion of said hydrogel layer being partially embedded in the inner portion of said base member at said pores to thereby achieve anchoring adhesion between said hydrogel layer and said base member, and said hydrogel layer having a smooth inner surface.
Claim 3
Dependent Claim
21 words
A synthetic vascular prosthesis according to claim 1, wherein said hydrogel layer has a thickness which measures a plurality of micrometers.
Claim 4
Dependent Claim
29 words
A synthetic vascular prosthesis according to claim 1, wherein said hydrogel layer is formed of a material selected from the group consisting of polyvinyl alcohol and ethylene-vinyl alcohol copolymers.
Claim 5
Dependent Claim
32 words
A synthetic vascular prosthesis according to claim 3, wherein said polyvinyl alcohol has a degree of polymerization of from 500 to 10,000 and a degree of saponification of not less than 80%.
Claim 6
Dependent Claim
29 words
A synthetic vascular prosthesis according to claim 1, wherein said base member is formed of a material selected from the group consisting of polyurethanes, polyurethane ureas and silicone polymers.
Claim 7
Dependent Claim
18 words
A synthetic vascular prosthesis according to claim 5, wherein said polyurethanes and polyurethane ureas are of polyether type.
Claim 8
Dependent Claim
24 words
A synthetic vascular prosthesis according to claim 6, wherein said polyether type polyurethanes and polyurethane ureas comprise polyether-segmented polyurethanes and polyether-segmented polyurethane ureas, respectively.
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |