US4511706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of a 4,4'-(ethylenedioxy)bis benzoate, an alkylene diol and a (2-alkenyl or alkyl) succinic anhydride
Assignee: Ethicon Inc
•
Filing: 1982-07-26
•
Granted: 1985-04-16
•
Expires: 2002-07-26
Abstract
Abstract Copolymers of an (ethylenedioxy)bis benzoate, an alkylene diol and a (2-alkenyl or alkyl) succinic anhydride, as well as surgical devices formed therefrom; especially, flexible monofilament surgical sutures having unique handling and knot-tying characteristics.
Inventors
- 👤 Shalaby W. Shalaby
- 👤 Dennis D. Jamiolkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A copolymer consisting essentially of a multiplicity of recurring A and B units having the following general formula: ##STR4## wherein x and y are numbers having average values such that the B units comprise from 1 to 55 weight percent of the copolymer, and the A units comprise the remainder, n is 2 to 8, and R represents a linear or branched alkyl or alkenyl radical with a chain length of 4 to 30 carbon atoms, or a mixture of such radicals with different chain lengths.
Claim 2
Dependent Claim
86 words
A copolymer consisting essentially of a multiplicity of recurring A and B units having the following general formula: ##STR4## wherein x and y are numbers having average values such that the B units comprise from 1 to 55 weight percent of the copolymer, and the A units comprise the remainder, n is 2 to 8, and R represents a linear or branched alkyl or alkenyl radical with a chain length of 4 to 30 carbon atoms, or a mixture of such radicals with different chain lengths.
Claim 3
Dependent Claim
56 words
The copolymer of claim 1, wherein n is 4 and R has chain lengths of 14 to 18 carbon atoms, said copolymer having an inherent viscosity (in hexafluoroisopropanol at a concentration of 0.1 g/dl and at a temperature of 25° C.) of between 0.5 and 2.2 and a melting temperature of between 100° and 200° C.
Claim 4
Dependent Claim
40 words
The copolymer of claim 2, wherein the B unit comprises from 20 to 40 weight percent of the copolymer, said copolymer having an inherent viscosity of between 0.8 and 1.5, and a melting temperature of between 135° and 170° C.
Claim 5
Dependent Claim
11 words
The copolymer of claim 3, wherein R is a hexadec-2-enyl group.
Claim 6
Dependent Claim
17 words
The copolymer of claim 4, wherein the B unit comprises about 30 weight percent of the copolymer.
Claim 7
Dependent Claim
15 words
The copolymer of claim 3, wherein R is a mixture of tetradec-2-enyl and octadec-2-enyl groups.
Claim 8
Dependent Claim
19 words
The copolymer of claim 6, wherein the tetradec-2-enyl and octadec-2-enyl groups are present in about a 50/50 mole ratio.
References Cited (Backward Citations)
US3278640A
Cited
US3525715A
Cited
US3547883A
Cited
US3542737A
Cited
US3632667A
Cited
US3816368A
Cited
US3890279A
Cited
US3991013A
Cited
US4224946A
Cited
US4248995A
Cited
US4238598A
Cited
US4346208A
Cited
US4265802A
Cited
US4387211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |