US4190720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomorphic copolymers of ε-caprolactone and 1,5-dioxepan-2-one
Assignee: Ethicon Inc
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Filing: 1978-12-26
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Granted: 1980-02-26
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Expires: 1998-12-26
Abstract
Abstract Isomorphic copolymers of ε-caprolactone with from about 3 to 15 percent 1,5-dioxepan-2-one have melting points in the range of 54° to 66° C. and may be extruded into fibers having elongations in the range of 120 to 235 percent. The copolymers are useful for the preparation of filaments, films and molded articles for general and surgical applications including surgical sutures and casts.
Inventors
- 👤 Shalaby W. Shalaby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:51
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/664
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
15 words
An isomorphic copolymer of ε-caprolactone with from about 3 to 15 percent by weight 1,5-dioxepan-2-one.
Claim 2
Dependent Claim
15 words
An isomorphic copolymer of ε-caprolactone with from about 3 to 15 percent by weight 1,5-dioxepan-2-one.
Claim 3
Dependent Claim
13 words
A copolymer of claim 1 having an inherent viscosity greater than about 1.4
Claim 4
Dependent Claim
14 words
A copolymer of claim 1 having a melting point of less than 70° C.
Claim 5
Dependent Claim
14 words
A copolymer of claim 1 having a crystallinity of at least about 40 percent.
Claim 6
Dependent Claim
21 words
A copolymer of claim 1 containing about 10 percent by weight 1,5-dioxepan-2-one and having a melting point of about 54° C.
Claim 7
Dependent Claim
8 words
A filament comprising a copolymer of claim 1.
Claim 8
Dependent Claim
14 words
A filament of claim 6 having a melting point of less than 70° C.
Claim 9
Dependent Claim
25 words
A filament of claim 6 comprising a copolymer containing from about 3 to 10 percent 1,5-dioxepan-2-one and having an elongation in excess of 150 percent.
Claim 10
Dependent Claim
15 words
A filament of claim 6 comprising a copolymer containing about 10 percent by weight 1,5-dioxepan-2-one.
Claim 11
Dependent Claim
13 words
A filament of claim 9 having a melting point of about 54° C.
Claim 12
Dependent Claim
8 words
A film comprising a copolymer of claim 1.
Claim 13
Dependent Claim
9 words
A molded article comprising a 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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |