US5037950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bioabsorbable copolymers of polyalkylene carbonate/RHO-dioxanone for sutures and coatings
Assignee: Ethicon Inc
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Filing: 1990-02-09
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Granted: 1991-08-06
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Expires: 2010-02-09
Abstract
Abstract Bioabsorbable copolymers comprising ρ-dioxanone and AA-BB type polyalkylene carbonates are provided. The copolymers are useful in the fabrication of sterile surgical articles and bioabsorbable coatings for sutures and are produced from organic carbonates by way of prepolymeric synthetic intermediates.
Inventors
- 👤 Rao S. Bezwada
- 👤 Shalaby W. Shalaby
- 👤 Alastair W. Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/105; A61L17/14; A61L17/145; A61L27/00; A61L27/14; A61L27/18; C08G63/00; C08G63/64
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
A bioabsorbable copolymer comprising from about 51 to about 99 mole percent of sequential units having formula (I); ##STR2## and from about 49 to about 1 mole percent of sequential units having formula (II), wherein x is an integer between 4 and 12, inclusive ##STR3##
Claim 2
Dependent Claim
45 words
A bioabsorbable copolymer comprising from about 51 to about 99 mole percent of sequential units having formula (I); ##STR2## and from about 49 to about 1 mole percent of sequential units having formula (II), wherein x is an integer between 4 and 12, inclusive ##STR3##
Claim 3
Dependent Claim
10 words
The bioabsorbable copolymer of claim 1 wherein x is 6.
Claim 4
Dependent Claim
36 words
The bioabsorbable copolymer of claim 2 wherein: from about 90 to about 65 mole percent of sequential units have formula (I); and from about 10 to about 35 mole percent of sequential units have formula (II).
Claim 5
Dependent Claim
12 words
A sterile surgical article fabricated from the bioabsorbable copolymer of claim 1.
Claim 6
Dependent Claim
14 words
A coating for a sterile surgical article comprising the bioabsorbable copolymer of claim 3.
Claim 7
Dependent Claim
13 words
The sterile surgical article of claim 5 in the form of a suture.
Claim 8
Dependent Claim
21 words
The sterile surgical suture of claim 6 wherein the suture is a monofilament or multifilament suture with or without a needle.
Claim 9
Dependent Claim
14 words
A coating for a sterile surgical suture comprising the bioabsorbable copolymer of claim 1.
Claim 10
Dependent Claim
34 words
The coating of claim 8 wherein the copolymer has an inherent viscosity between about 0.1 and about 1.0 deciliters per gram measured at 25° C. in a 0.1 dl/g solution of hexafluoroisopropyl alcohol solution.
Claim 11
Dependent Claim
20 words
The coating of claim 9 wherein the copolymer is between about 2 and about 15 weight percent of said suture.
Claim 12
Dependent Claim
20 words
The coating of claim 10 wherein the copolymer is between about 3 and about 10 weight percent of said suture.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |