Patent US2560594A successfully refreshed from Google Patents.
US3797499A
Expired / Lapsed
US
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Polylactide fabric graphs for surgical implantation
Assignee: Ethicon Inc
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Filing: 1971-10-06
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Granted: 1974-03-19
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Expires: 1991-10-06
Abstract
Abstract Absorbable surgical sutures that are dimensionally stable within the body may be prepared by the extrusion of polylactide polymer, including copolymers of L(-) lactide with up to 35 mole percent of glycolide. Said polymers are characterized by an inherent viscosity of at least 1.0, and the extruded filaments are oriented by drawing at a temperature of about 50* to about 140* at a draw ratio of up to 11 X , and annealed. Sutures so prepared have a tensile strength of from 25,000 p.s.i. to 100,000 p.s.i.
Inventors
- 👤 A Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:22
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06166; A61B2017/00004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The vascular graft of claim 1, packaged within an evacuated, hermetically-sealed container.
Claim 2
Dependent Claim
174 words
A sterile vascular graft manufactured from a multifilament yarn containing non-absorbable filaments selected from the group consisting of polyester filaments, polytetrafluoroethylene filaments, and nylon filaments; said sterile multifilament yarn also containing filaments absorbable without causing unfavorable tissue reaction and essentially dimensionally stable within the body, said absorbable filaments comprising an oriented synthetic polylactide copolymer containing at least about 65 mol per cent of repeating units derived from one antipodal species of Alpha -hydroxypropionic acid and not more than about 35 mol Percent of repeating units derived from Alpha -hydroxyacetic acid, said polylactide being characterized by having an inherent viscosity of at least 1.2 at 0.1 percent concentration in a suitable solvent at 25*C. and by losing at least about 20 percent of its weight on treatment with boiling water for a period of 100 hours, and being further characterized by exhibiting a tensile strength of from 40,000 p.s.i. to about 100,000 p.s.i. and by having a diameter of 0.0005-0.045 inches; said sterile vascular graft being packaged in a dry atmosphere within a hermetically-sealed container.
Claim 3
Dependent Claim
12 words
The vascular graft of claim 3, packaged within an evacuated, hermetically-sealed container.
Claim 4
Dependent Claim
83 words
A sterile absorbable fabric, useful surgically in hernia repair and in supporting damaged liver, kidney, and other organs, said fabric being woven or knitted of filaments that are absorbable without causing unfavorable tissue reaction, and essentially dimensionally stable within the body said filaments comprising an oriented synthetic polylactide polymer containing more than about 85 percent by weight of repeating units of one antipodal species of Alpha -hydroxypropionic acid and no more than about 15 percent by weight of repeating units of the formula
Claim 5
Dependent Claim
154 words
A sterile absorbable fabric, useful surgically in hernia repair and in supporting damaged liver, kidney and other organs, said fabric being woven or knitted of filaments that are absorbable without causing unfavorable tissue reaction, and essentially dimensionally stable within the body said filaments comprising an oriented synthetic polylactide copolymer containing at least about 65 mol percent of repeating units derived from one antipodal species of Alpha -hydroxypropionic acid and not more than about 35 mol percent of repeating units derived from Alpha -hydroxyacetic acid, said polylactide being characterized by having an inherent viscosity of at least 1.2 at 0.1 percent concentration in a suitable solvent at 25*C. and by losing at least about 20 percent of its weight on treatment with boiling water for a period of 100 hours, and being further characterized by exhibiting a tensile strength of from 40,000 p.s.i. to about 100,000 p.s.i. and by having a diameter of 0.0005-0.045 inches.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |