Patent US5061281A successfully refreshed from Google Patents.
US5061281A
Expired / Lapsed
US
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Bioresorbable polymers and implantation devices thereof
Assignee: United States Surgical Corp
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Filing: 1986-12-17
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Granted: 1991-10-29
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Expires: 2006-12-17
Abstract
Abstract This invention relates to an implantable medical device capable of encouraging cellular growth and regeneration of function fabricated totally or in part from one or more bioresorbable polymers, as for example bioresorbable homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, where at least one of the polymers has an average molecular weight of from about 234,000 to about 320,000 as measured by gel permeation chromatography.
Inventors
- 👤 Frank Mares
- 👤 Reginald T. Tang
- 👤 Tin-Ho Chiu
- 👤 Theodore Largman
- 👤 Emery Nyilas, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/58; A61B; A61B17/00; A61B17/11; A61B17/1128; A61L27/14; A61L27/18; A61L27/28; A61L27/34; A61B2017/00004; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2230/00; A61F2230/0063; A61F2230/0069; A61L2430/00; A61L2430/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
In an improved device suitable for implantation into a living organism said device capable of encouraging cellular growth and regeneration of function, the improvement which comprises all or a portion of said device comprised of a mixture of one or more bioresorbable polymers selected from the group consisting of a mixture of two or more bioresorbable homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, and a mixture of one or more bioresorbable terpolymers derived from the condensation of a dicarboxylic acid, an alpha hydroxy carboxylic acid and an aliphatic diol and one or more homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, said homopolymers and said terpolymers having an average molecular weight equal to or greater than about 150,000 as measured by gel permeation chromatography and wherein at least one of said homopolymers and said terpolymers has an average molecular weight of from about 234,000 to about 320,000 as measured by gel permeation chromatography.
Claim 2
Dependent Claim
156 words
In an improved device suitable for implantation into a living organism said device capable of encouraging cellular growth and regeneration of function, the improvement which comprises all or a portion of said device comprised of a mixture of one or more bioresorbable polymers selected from the group consisting of a mixture of two or more bioresorbable homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, and a mixture of one or more bioresorbable terpolymers derived from the condensation of a dicarboxylic acid, an alpha hydroxy carboxylic acid and an aliphatic diol and one or more homopolymers derived from the polymerization of alpha-hydroxy carboxylic acids, said homopolymers and said terpolymers having an average molecular weight equal to or greater than about 150,000 as measured by gel permeation chromatography and wherein at least one of said homopolymers and said terpolymers has an average molecular weight of from about 234,000 to about 320,000 as measured by gel permeation chromatography.
Claim 3
Dependent Claim
14 words
The device of claim 1 wherein at least one of said polymers is poly(lactide).
Claim 4
Dependent Claim
10 words
The device of claim 2 wherein said poly(lactide) is poly(DL-lactide).
Claim 5
Dependent Claim
23 words
The device of claim 3 wherein said mixture comprises two polymers one of which is poly(DL-lactide and the other of which is poly(l-lactide).
Claim 6
Dependent Claim
15 words
The device of claim 1 which is a nerve channel which comprises a tubular body.
Claim 7
Dependent Claim
24 words
The nerve channel of claim 5 wherein the mixture of bioresorbable polymers is in a form of a thin coating over a biodurable material.
References Cited (Backward Citations)
US2703316A
Cited
US2668162A
Cited
US3463158A
Cited
US3531561A
Cited
US3636956A
Cited
US3797499A
Cited
US3867190A
Cited
US3792010A
Cited
US3883901A
Cited
US4032993A
Cited
US4137921A
Cited
US4157437A
Cited
US4279249A
Cited
US4243775A
Cited
US4273920A
Cited
US4331652A
Cited
US4534349A
Cited
US4643734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |