Patent US2919999A successfully refreshed from Google Patents.
US2919999A
Expired / Lapsed
US
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Collagen article and the manufacture thereof
Assignee: Ethicon Inc
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Filing: 1958-10-22
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Granted: 1960-01-05
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Expires: 1978-10-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Reissmann
- 👤 Nichols Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:03
CPC Classifications
D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR THE EXTRUSION OF A HOMOGENOUS COLLAGEN DISPERSION TO FORM A SHAPED ARTICLE, THE IMPROVEMENT WHICH COMPRISES SWELLING AND DISPERSING COLLAGEN FIBERS DERIVED FROM ANIMAL TENDONS IN AN AQUEOUS METHANOL SOLUTION OF A PERFLUORO ACID HAVING THE FORMULA CF3(CF2)NCOOH, IN WHICH N IS A WHOLE INTEGER SMALLER THAN 7, SAID METHANOL AMOUNTING TO ABOUT 50 PERCENT OF THE TOTAL WEIGHT OF THE AQUEOUS METHANOL SOLUTION.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR THE EXTRUSION OF A HOMOGENOUS COLLAGEN DISPERSION TO FORM A SHAPED ARTICLE, THE IMPROVEMENT WHICH COMPRISES SWELLING AND DISPERSING COLLAGEN FIBERS DERIVED FROM ANIMAL TENDONS IN AN AQUEOUS METHANOL SOLUTION OF A PERFLUORO ACID HAVING THE FORMULA CF3(CF2)NCOOH, IN WHICH N IS A WHOLE INTEGER SMALLER THAN 7, SAID METHANOL AMOUNTING TO ABOUT 50 PERCENT OF THE TOTAL WEIGHT OF THE AQUEOUS METHANOL SOLUTION.
References Cited (Backward Citations)
US2622036A
Cited
US2631942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |