US4300565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic polyester surgical articles
Assignee: Covidien AG
•
Filing: 1980-09-26
•
Granted: 1981-11-17
•
Expires: 2000-09-26
Abstract
Abstract A procedure is disclosed employing the sequential addition of monomers to form a copolymer useful in the manufacture of surgical articles.
Inventors
- 👤 Michael N. Rosensaft
- 👤 Richard L. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:12
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/12; C08G63/64
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
66 words
A sterile surgical article fabricated from a synthetic absorbable copolymer formed by copolymerizing glycolide as the predominant monomer with a cyclic ester monomer other than glycolide, the improvement comprising employing sequential addition of the monomers in the polymerization wherein said glycolide monomer, said cyclic ester monomer, or a combination of said monomers is substantially completely polymerized before the addition of the other monomer or said combination.
Claim 2
Dependent Claim
66 words
A sterile surgical article fabricated from a synthetic absorbable copolymer formed by copolymerizing glycolide as the predominant monomer with a cyclic ester monomer other than glycolide, the improvement comprising employing sequential addition of the monomers in the polymerization wherein said glycolide monomer, said cyclic ester monomer, or a combination of said monomers is substantially completely polymerized before the addition of the other monomer or said combination.
Claim 3
Dependent Claim
14 words
An article according to claim 1 wherein said cyclic ester monomer is L(-) lactide.
Claim 4
Dependent Claim
22 words
An article according to claim 1 wherein said cyclic ester monomer is selected from the group consisting of lactones, oxalates or carbonates.
Claim 5
Dependent Claim
13 words
An article according to claim 3 wherein said cyclic ester monomer is 1,3-dioxan-2-one.
Claim 6
Dependent Claim
13 words
An article according to claim 1 wherein said cyclic ester monomer is epsilon-caprolactone.
Claim 7
Dependent Claim
14 words
An article according to claim 1 in the form of a suture or ligature.
Claim 8
Dependent Claim
15 words
An article according to claim 6 in the form of a needle and suture combination.
Claim 9
Dependent Claim
41 words
A sterile surgical article fabricated from a synthetic absorbable copolymer comprising a proportion of sequential units having the formula: ##STR3## and a proportion of sequential units having the formula: ##STR4## wherein formula (II) consists of up to about 50% by weight.
Claim 10
Dependent Claim
41 words
A sterile surgical article fabricated from a synthetic absorbable copolymer comprising a proportion of sequential units having the formula: ##STR3## and a proportion of sequential units having the formula: ##STR4## wherein formula (II) consists of up to about 50% by weight.
Claim 11
Dependent Claim
36 words
An article of claim 8 having a melting point of about 217° C. to 221° C. as described by the peak in a differential scanning calorimeter operating at a heating rate of 10° C. per minute.
Claim 12
Dependent Claim
16 words
An article of claim 9 having an inherent viscosity of about 0.5 dl/g. to 2 dl/g.
Claim 13
Dependent Claim
16 words
An article of claim 10 having an inherent viscosity of about 0.7 dl/g to 1.2 dl/g.
Claim 14
Dependent Claim
20 words
An article of claim 8 or 9 or 11 wherein formula (II) consists of up to about 35% by weight.
Claim 15
Dependent Claim
17 words
An article of claim 12 wherein formula (II) consists of between about 10% to 20% by weight.
Claim 16
Dependent Claim
14 words
An article according to claim 8 in the form of a suture or ligature.
Claim 17
Dependent Claim
15 words
An article according to claim 14 in the form of a needle and suture combination.
Claim 18
Dependent Claim
28 words
A method of retaining living tissue in a desired relationship during a healing process by positioning and emplacing living tissue with a sterile surgical article of claim 8.
Claim 19
Dependent Claim
24 words
A method of closing a wound of living tissue which comprises sewing the edges of the wound with a needled suture of claim 15.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |