Patent US4470416A successfully refreshed from Google Patents.
US4470416A
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Copolymers of lactide and/or glycolide with 1,5-dioxepan-2-one
Assignee: Ethicon Inc
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Filing: 1983-06-17
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Granted: 1984-09-11
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Expires: 2003-06-17
Abstract
Abstract Copolymers are prepared from 1,5-dioxepan-2-one and lactide and/or glycolide. The copolymers are useful in surgical applications such as sutures, suture lubricants, and allied surgical products. 1,5-Dioxepan-2-one is produced by a new process comprising first reacting ethylene glycol with an alkyl acrylate to form alkyl 3-(2-hydroxyethoxy)propionate, which is then cyclized by contacting with a trans-esterification catalyst.
Inventors
- 👤 Adel Kafrawy
- 👤 Frank V. Mattei
- 👤 Shalaby W. Shalaby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:02
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/664; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/12; A61L17/14; A61L17/145; A61L27/00; A61L27/14; A61L27/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
24 words
A copolymer which comprises the repeating divalent units of the formulas: --(--O--CO--CHR--)-- and --(--O--CO--CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --)-- wherein R represents hydrogen or methyl.
Claim 2
Dependent Claim
24 words
A copolymer which comprises the repeating divalent units of the formulas: --(--O--CO--CHR--)-- and --(--O--CO--CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --)-- wherein R represents hydrogen or methyl.
Claim 3
Dependent Claim
33 words
The copolymer of claim 1 wherein the divalent unit of the formula --(--O--CO--CH 2 CH 2 OCH 2 CH 2 --)-- constitutes from about 3 to about 33 mole percent of the copolymer.
Claim 4
Dependent Claim
8 words
A fiber comprising the copolymer of claim 2.
Claim 5
Dependent Claim
10 words
A sterile surgical suture comprising the fiber of claim 3.
Claim 6
Dependent Claim
18 words
The sterile suture of claim 4 attached at at least one end thereof to a sterile surgical needle.
Claim 7
Dependent Claim
33 words
The copolymer of claim 1 wherein the divalent unit of the formula --(--O--CO--CH 2 CH 2 OCH 2 CH 2 --)-- constitutes from about 40 to about 80 mole percent of the copolymer.
Claim 8
Dependent Claim
15 words
A sterile suture containing a coating of the copolymer of claim 6 as a lubricant.
Claim 9
Dependent Claim
11 words
The sterile suture of claim 7 wherein said suture is braided.
Claim 10
Dependent Claim
9 words
A surgical device comprising the copolymer of claim 1.
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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |