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US4904272A
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Crosslinked polyurethane medical prosthesis
Assignee: Ethicon Inc
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Filing: 1988-07-22
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Granted: 1990-02-27
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Expires: 2008-07-22
Abstract
Abstract A fibrous polyurethane medical prosthesis wherein the polyurethane has been at least partially crosslinked with a haloalkylisocyanate.
Inventors
- 👤 Ian P. Middleton
- 👤 Jerzy Paprotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/18; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S264/00; Y10S264/42; Y10S264/77; Y10S623/00; Y10S623/92; Y10S623/921; Y10S623/924; Y10S623/926
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
A polyurethane medical prosthesis which is an electrostatically spun product comprising a structure of fibrous polyurethane material wherein the polyurethane material in the individual fibers is at least partially crosslinked with the a vaporizable halo-alkylisocyanate, wherein there is substantially no crosslinking between the fibers.
Claim 2
Dependent Claim
44 words
A polyurethane medical prosthesis which is an electrostatically spun product comprising a structure of fibrous polyurethane material wherein the polyurethane material in the individual fibers is at least partially crosslinked with the a vaporizable halo-alkylisocyanate, wherein there is substantially no crosslinking between the fibers.
Claim 3
Dependent Claim
13 words
The medical prosthesis of claim 2, wherein the halo-alkyl isocyanate is chloromethyl isocyanate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |