Patent US5320624A successfully refreshed from Google Patents.
US5320624A
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US
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Blends of glycolide and/or lactide polymers and caprolactone and/or trimethylene carbonate polymers and absorbable surgical devices made therefrom
Assignee: United States Surgical Corp
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Filing: 1993-04-12
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Granted: 1994-06-14
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Expires: 2013-04-12
Abstract
Abstract Polymer blends of glycolide and/or lactide homopolymer and/or glycolide/lactide copolymer and polycaprolactone and/or polytrimethylene carbonate homopolymer or copolymers thereof and absorbable surgical devices manufactured therefrom having improved mechanical properties, such as improved impact resistance and improved cyclic flex, are disclosed.
Inventors
- 👤 Donald S. Kaplan
- 👤 Matthew Hermes
- 👤 Ross R. Muth
- 👤 John Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:30
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61L27/00; A61L27/40; A61L27/44; A61L27/48; A61L27/50; A61L27/58; A61L31/12; A61L31/125; A61L31/129; C; C08; C08L; C08L67/00; C08L67/04; A61B2017/00004; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/3094; A61F2/30965
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
44 words
A polymer composition useful in the production of improved absorbable surgical devices, the composition comprising a blend of: a) a copolymer of glycolide and lactide; and b) a copolymer of lactide and trimethylene carbonate having a trimethylene carbonate content of at least about 70%.
Claim 2
Dependent Claim
44 words
A polymer composition useful in the production of improved absorbable surgical devices, the composition comprising a blend of: a) a copolymer of glycolide and lactide; and b) a copolymer of lactide and trimethylene carbonate having a trimethylene carbonate content of at least about 70%.
Claim 3
Dependent Claim
19 words
A composition as in claim 1 wherein said copolymer of glycolide and lactide contains at least about 70% lactide.
Claim 4
Dependent Claim
22 words
A composition as in claim 1 wherein said copolymer of lactide and trimethylene carbonate has a trimethylene carbonate content of about 80%.
Claim 5
Dependent Claim
20 words
A composition as in claim 2 wherein said copolymer of glycolide and lactide has a lactide content of about 80%.
Claim 6
Dependent Claim
26 words
A composition as in claim 1 wherein said blend contains from about 70 to about 80 percent by weight of said copolymer of glycolide and lactide.
Claim 7
Dependent Claim
18 words
A composition as in claim 1 wherein said copolymer of lactide and trimethylene carbonate is a random copolymer.
Claim 8
Dependent Claim
13 words
A composition as in claim 1 wherein said blend is extrudable into fibers.
Claim 9
Dependent Claim
22 words
A composition as in claim 5 wherein said copolymer of lactide and trimethylene carbonate has a trimethylene carbonate content of about 80%.
Claim 10
Dependent Claim
20 words
A composition as in claim 8 wherein said copolymer of glycolide and lactide has a lactide content of about 80%.
Claim 11
Dependent Claim
36 words
The polymer composition of claim 1 wherein the glycolide/lactide copolymer has an inherent viscosity of from about 0.9 to about 2.0 dl/g measured at 30° C. at a concentration of 0.25 g/dl in chloroform or hexafluoroisopropanol.
Claim 12
Dependent Claim
41 words
A polymer composition as in claim 5 wherein said blend contains 25% by weight of said lactide trimethylene carbonate copolymer and 75% of said copolymer of glycolide and lactide, said copolymer of glycolide and lactide containing 82% lactide and 18% glycolide.
Claim 13
Dependent Claim
53 words
An absorbable surgical device derived from a polymer composition comprising a blend of: (a) a glycolide/lactide copolymer; and (b) from about 1 to about 30 weight percent, based on the total weight of the blend, of a copolymer of trimethylene carbonate and lactide having a trimethylene carbonate content of at least about 70%.
Claim 14
Dependent Claim
53 words
An absorbable surgical device derived from a polymer composition comprising a blend of: (a) a glycolide/lactide copolymer; and (b) from about 1 to about 30 weight percent, based on the total weight of the blend, of a copolymer of trimethylene carbonate and lactide having a trimethylene carbonate content of at least about 70%.
Claim 15
Dependent Claim
18 words
An absorbable surgical device as in claim 12 wherein said glycolide/lactide copolymer contains at least about 70% lactide.
Claim 16
Dependent Claim
25 words
An absorbable surgical device as in claim 12 wherein said blend contains from about 70 to abut 80 percent by weight of said glycolide/lactide copolymer.
Claim 17
Dependent Claim
24 words
An absorbable surgical device as in claim 14 wherein said copolymer of lactide and trimethylene carbonate has a trimethylene carbonate content of about 80%.
Claim 18
Dependent Claim
41 words
An absorbable surgical device as in claim 15 wherein said blend contains 25% by weight of said lactide/trimethylene carbonate copolymer and 75% of said copolymers of glycolide and lactide, said copolymer of glycolide and lactide containing 82% lactide and 18% glycolide.
Claim 19
Dependent Claim
23 words
The absorbable surgical device of claim 12 wherein said device is selected from the group consisting of a fastener, pin and bone screw.
Claim 20
Dependent Claim
16 words
An absorbable surgical device as in claim 12 wherein said surgical device is a bone pin.
Claim 21
Dependent Claim
21 words
An absorbable surgical device as in claim 12 wherein said surgical device comprises at least one fiber formed from said blend.
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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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |