Patent US4549545A successfully refreshed from Google Patents.
US4549545A
Expired / Lapsed
US
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Segmented polyurethane surgical buttressing pledgets
Assignee: Ethicon Inc
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Filing: 1984-03-05
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Granted: 1985-10-29
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Expires: 2004-03-05
Abstract
Abstract A surgical buttressing pledget for use with a suture wherein the pledget comprises a mat of continuous microfibers, wherein said microfibers consist essentially of a segmented urethane polymer.
Inventors
- 👤 Alan J. Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06166; A61L; A61L31/00; A61L31/04; A61L31/06; A61B17/06066; A61B17/0401; A61B2017/0406; A61B2017/06057
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
57 words
A suture/pledget combination comprising a suture threaded through a perforated pledget, wherein the pledget comprises a mat of continuous filament microfibers, wherein said microfibers consist essentially of a segmented urethane polymer comprising the reaction product of a polyether or polyester glycol having a molecular weight of at least about 200, an organic diisocyanate, and a difunctional extender.
Claim 2
Dependent Claim
57 words
A suture/pledget combination comprising a suture threaded through a perforated pledget, wherein the pledget comprises a mat of continuous filament microfibers, wherein said microfibers consist essentially of a segmented urethane polymer comprising the reaction product of a polyether or polyester glycol having a molecular weight of at least about 200, an organic diisocyanate, and a difunctional extender.
Claim 3
Dependent Claim
28 words
The suture/pledget combination of claim 1 wherein the glycol is a poly(tetramethylene ether) glycol having a molecular weight within the range of from about 800 to about 5,000.
Claim 4
Dependent Claim
14 words
The suture/pledget combination of claim 1 wherein the organic diisocyanate is an aromatic diisocyanate.
Claim 5
Dependent Claim
13 words
The suture/pledget combination of claim 3 wherein the aromatic diisocyanate is diphenylmethane diisocyanate.
Claim 6
Dependent Claim
23 words
The suture/pledget combination of claim 1 wherein the difunctional extender is a dihydric alcohol, a diamine containing two primary amino groups, or water.
Claim 7
Dependent Claim
13 words
The suture/pledget combination of claim 5 wherein the difunctional extender is 1,4-butane diol.
Claim 8
Dependent Claim
20 words
The suture/pledget combination of claim 1 wherein the reactants employed to produce the segmented urethane polymer includes a monofunctional end-blocker.
Claim 9
Dependent Claim
47 words
The suture/pledget combination of claim 1 wherein the orientation of the microfibers in said mat is anisotropic, and wherein said suture is threated through said pledget such that the suture is oriented in a direction substantially perpendicular to the direction of the predominant orientation of said microfibers.
Claim 10
Dependent Claim
15 words
The suture/pledget combination of any one of claims 1 through 8 in a sterile condition.
Claim 11
Dependent Claim
57 words
A surgical buttressing pledget adapted to be employed with a surgical suture, said pledget comprising a mat of continuous filament microfibers, wherein said microfibers consist essentially of a segmented urethane polymer comprising the reaction product of a polyether or polyester glycol having a molecular weight of at least about 200, an organic diisocyanate, and a difunctional extender.
Claim 12
Dependent Claim
57 words
A surgical buttressing pledget adapted to be employed with a surgical suture, said pledget comprising a mat of continuous filament microfibers, wherein said microfibers consist essentially of a segmented urethane polymer comprising the reaction product of a polyether or polyester glycol having a molecular weight of at least about 200, an organic diisocyanate, and a difunctional extender.
Claim 13
Dependent Claim
9 words
The pledget of claim 10 in a sterile condition.
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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |