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US3565077A
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Densified absorbably polyglycolic acid suture braid, and method for preparing same
Assignee: Wyeth Holdings LLC
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Filing: 1968-05-06
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Granted: 1971-02-23
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Expires: 1988-05-06
Abstract
Abstract The densified polyglycolic acid suture braid is characterized by a tightly compacted braid structure, and has a void fraction of up to about 50 percent less than the void fraction of conventionally fabricated nondensified suture braids. The densified braid is prepared by subjecting a nondensified braid to a tensile force of up to about three-fourths that required to break the nondensified braid. The densified suture braid exhibits substantially enhanced in vivo strength retention compared to nondensified braids.
Inventors
- 👤 Arthur Glick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/14; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06166; A61B2017/00004; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A method for preparing an absorbable densified polyglycolic acid suture braid which comprises: subjecting an absorbable nondensified polyglycolic acid suture braid to a tensile pull of up to about three-fourths of the force required to break said braid, in a dry atmosphere, at a temperature between about 20* C. and 170* C., thereby reducing the void fraction to about 13 percent to about 23 percent, and increasing the apparent density to about 1.1 to about 1.25 grams per cubic centimeter, and increasing the 7 and 15 day strength in normal muscular tissue.
Claim 2
Dependent Claim
17 words
The method of claim 2 wherein the temperature is from about 130* C. to about 150* C.
Claim 3
Dependent Claim
19 words
The method of claim 3 wherein the tensile pull is equal to the knot strength of the undensified suture.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |