US4209607A
Expired / Lapsed
US
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Polyesteramides derived from bis-oxamidodiols and dicarboxylic acids
Assignee: Ethicon Inc
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Filing: 1978-05-12
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Granted: 1980-06-24
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Expires: 1998-05-12
Abstract
Abstract Alternating esteramide polymers are obtained from the reaction of bis-oxamidodiols such as N,N'-bis(ω-hydroxyalkylene)oxamide with a dicarboxylic acid or diesters such as diethyl oxalate, diethyl succinate, diethyl suberate, or dimethyl terephthalate. The polymers are obtained in good yield and have film- and fiber-forming properties. Some polymers are absorbable in biological systems and are useful as absorbable surgical devices. Other of these polymers are nonabsorbable and are useful as textile fibers.
Inventors
- 👤 Shalaby W. Shalaby
- 👤 Dennis D. Jamiolkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:57
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/105; A61L27/00; A61L27/14; A61L27/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
Alternating esteramide polymer having repeating units represented by ##STR4## wherein R is a divalent aliphatic or aromatic hydrocarbon radical having from 3 to about 8 carbon atoms, R' is a divalent hydrocarbon radical having from 1 to about 8 carbon atoms, A is a divalent oxyalkylene radical having from 4 to 8 carbon atoms, m is 0 or 1, n is 0 or 1, and x is the degree of polymerization resulting in a film-forming or fiber-forming polymer.
Claim 2
Dependent Claim
78 words
Alternating esteramide polymer having repeating units represented by ##STR4## wherein R is a divalent aliphatic or aromatic hydrocarbon radical having from 3 to about 8 carbon atoms, R' is a divalent hydrocarbon radical having from 1 to about 8 carbon atoms, A is a divalent oxyalkylene radical having from 4 to 8 carbon atoms, m is 0 or 1, n is 0 or 1, and x is the degree of polymerization resulting in a film-forming or fiber-forming polymer.
Claim 3
Dependent Claim
20 words
The polymer of claim 1 wherein R is selected from the group consisting of alkylene cycloalkylene, alkylene-cycloalkylene, arylene, and alkylarylene.
Claim 4
Dependent Claim
9 words
The polymer of claim 1 wherein n is 0.
Claim 5
Dependent Claim
22 words
The polymer of claim 3 wherein R is C 3 to C 8 alkylene, C 6 to C 8 cycloalkylene or alkylarylene.
Claim 6
Dependent Claim
10 words
The polymer of claim 3 which is poly N,N'-bis(trimethylene)oxamido oxalate.
Claim 7
Dependent Claim
10 words
The polymer of claim 3 which is poly N,N'-bis(pentamethylene)oxamido oxalate.
Claim 8
Dependent Claim
10 words
The polymer of claim 3 which is poly N,N'-bis(hexamethylene)oxamido oxalate.
Claim 9
Dependent Claim
17 words
The polymer of claim 1 wherein m is 1 and A is --O-(CH 2 ) 6 --.
Claim 10
Dependent Claim
21 words
The polymer of claim 1 wherein n is 1 and R' is C 1-6 alkylene or C 6 H 4 arylene.
Claim 11
Dependent Claim
17 words
The polymer of claim 1 wherein n is 1 and R' is --(CH 2 ) 2 --.
Claim 12
Dependent Claim
10 words
The polymer of claim 10 which is poly N,N'-bis(hexamethylene)oxamido succinate.
Claim 13
Dependent Claim
17 words
The polymer of claim 1 wherein n is 1 and R' is --(CH 2 ) 6 --.
Claim 14
Dependent Claim
10 words
The polymer of claim 12 which is poly N,N'-bis(hexamethylene)oxamido suberate.
Claim 15
Dependent Claim
16 words
The polymer of claim 1 wherein n is 1 and R' is the p-phenylene divalent radical.
Claim 16
Dependent Claim
10 words
The polymer of claim 14 which is poly N,N'-bis(hexamethylene)oxamido terephthalate.
References Cited (Backward Citations)
US2659713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |