US4140678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic absorbable surgical devices of poly(alkylene oxalates)
Assignee: Ethicon Inc
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Filing: 1977-06-13
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Granted: 1979-02-20
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Expires: 1997-06-13
Abstract
Abstract Synthetic filaments composed of homopolymers and copolymers of poly(alkylene oxalates) are absorbable in animal tissue with minimal adverse tissue reaction. Polymers prepared by reacting a dialkyl oxalate with an alkylene diol are melt spun and drawn to obtain oriented fibers having good tensile properties and a high level of flexibility and softness. The filaments are particularly useful in the preparation of surgical prosthesis comprising woven or knitted fabrics and meshes. Other absorbable surgical devices including films and molded items may also be prepared from the disclosed polymer.
Inventors
- 👤 Shalaby W. Shalaby
- 👤 Dennis D. Damiolkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:45
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/78; D01F6/84; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/105; A61L27/00; A61L27/14; A61L27/18; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; D01F6/58; D01F6/62; D01F6/625; Y; Y10; Y10S; Y10S623/00; Y10S623/924; Y10S623/926
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
A sterile absorbable surgical fiber comprising a polymer having a major portion of units of the formula ##STR3## wherein R is a C 3 to C 16 alkylene and n is the degree of polymerization resulting in a fiber-forming polymer having an inherent viscosity of at least about 0.4 as determined at 25° C. on a 0.1 percent solution of polymer in chloroform or hexafluoroisopropanol.
Claim 2
Dependent Claim
65 words
A sterile absorbable surgical fiber comprising a polymer having a major portion of units of the formula ##STR3## wherein R is a C 3 to C 16 alkylene and n is the degree of polymerization resulting in a fiber-forming polymer having an inherent viscosity of at least about 0.4 as determined at 25° C. on a 0.1 percent solution of polymer in chloroform or hexafluoroisopropanol.
Claim 3
Dependent Claim
27 words
A fiber of claim 1 further characterized by a straight tensile strength of at least 30,000 psi and a Young's modulus of less than about 600,000 psi.
Claim 4
Dependent Claim
15 words
A fiber of claim 2 wherein R is a C 4 to C 10 alkylene.
Claim 5
Dependent Claim
40 words
A fiber of claim 1 wherein said polymer is a copolymer of C 3 to C 16 alkylene oxalate with up to about 50 percent by weight of at least one other monomer copolymerizable therewith to form an absorbable polymer.
Claim 6
Dependent Claim
15 words
A fiber of claim 4 wherein said other monomer is lactide, glycolide or mixtures thereof.
Claim 7
Dependent Claim
8 words
A fiber of claim 1 comprising poly(tetramethylene oxalate).
Claim 8
Dependent Claim
8 words
A fiber of claim 1 comprising poly(hexamethylene oxalate).
Claim 9
Dependent Claim
8 words
A fiber of claim 1 comprising poly(octamethylene oxalate).
Claim 10
Dependent Claim
8 words
A fiber of claim 1 comprising poly(decamethylene oxalate).
Claim 11
Dependent Claim
24 words
A fiber of claim 1 comprising a major proportion of said polymer and a minor proportion of at least one other synthetic absorbable polymer.
Claim 12
Dependent Claim
25 words
A fiber of claim 10 wherein said other synthetic absorbable polymer is selected from the group consisting of homopolymers and copolymers of lactide and glycolide.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |