US5032638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bioabsorbable coating for a surgical device
Assignee: Wyeth Holdings LLC
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Filing: 1986-09-05
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Granted: 1991-07-16
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Expires: 2006-09-05
Abstract
Abstract A suture coating comprising a copolymer having about 60 to 80 weight percent of β-hydroxybutyrate linkages is disclosed. The remaining linkages can be at least β-hydroxyvalerate. In one embodiment, the coating is the copolymer combined with a stearoyl lactylate having the formula: ##STR1## wherein X is at least two, and R is an alkaine-earth metal.
Inventors
- 👤 David W. Wang
- 👤 Leonard T. Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/14; A61L17/145; A61L27/00; A61L27/28; A61L27/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
A coating for a synthetic bioabsorbable suture comprising a bioabsorbable copolymer having up to about 60 to 80 weight percent of β-hydroxybutyrate linkages and the remaining linkages comprising β-hydroxyvalerate, said co-polymer having an inherent viscosity of about 1.5 to 5.0 measured at 30° C. on a 0.5 percent weight per volume solution of the copolymer in hexafluoroacetone sesquihydrate, said copolymer in combination with a stearoyl lactylate having the formula: ##STR4## wherein X is at least two, and R is an alkaline-earth metal.
Claim 2
Dependent Claim
82 words
A coating for a synthetic bioabsorbable suture comprising a bioabsorbable copolymer having up to about 60 to 80 weight percent of β-hydroxybutyrate linkages and the remaining linkages comprising β-hydroxyvalerate, said co-polymer having an inherent viscosity of about 1.5 to 5.0 measured at 30° C. on a 0.5 percent weight per volume solution of the copolymer in hexafluoroacetone sesquihydrate, said copolymer in combination with a stearoyl lactylate having the formula: ##STR4## wherein X is at least two, and R is an alkaline-earth metal.
Claim 3
Dependent Claim
13 words
A coating of claim 1 wherein X is two and R is calcium.
References Cited (Backward Citations)
US4477654A
Cited
US4562246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |