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US3131130A
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Method of producing soluble collagen
Assignee: Ethicon Inc
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Filing: 1961-07-31
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Granted: 1964-04-28
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Irving B Oneson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
C; C09; C09H; C09H3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF PRODUCING SOLUBLE COLLAGEN MONOMERS WHICH COMPRISES THE STEPS OF: TREATING FINELY DIVIDED NATIVE COLLAGEN WITH A DILUTE ACID SOLUTION TO SWELL THE COLLAGEN FIBRILS; TREATING THE ACID SWOLLEN COLLAGEN FIBRILS WITH AN ELASTASE WHILE MAINTAINING THE TEMPERATURE BETWEEN 0*C. AND 30*C. UNTIL ALL OF THE SWOLLEN COLLAGEN FIBRILS DISSOLVE; AND, STOPPING THE REACTION AT THAT POINT BY REMOVING THE ACID FROM SOLUTION.
Claim 2
Independent Claim
65 words
THE METHOD OF PRODUCING SOLUBLE COLLAGEN MONOMERS WHICH COMPRISES THE STEPS OF: TREATING FINELY DIVIDED NATIVE COLLAGEN WITH A DILUTE ACID SOLUTION TO SWELL THE COLLAGEN FIBRILS; TREATING THE ACID SWOLLEN COLLAGEN FIBRILS WITH AN ELASTASE WHILE MAINTAINING THE TEMPERATURE BETWEEN 0*C. AND 30*C. UNTIL ALL OF THE SWOLLEN COLLAGEN FIBRILS DISSOLVE; AND, STOPPING THE REACTION AT THAT POINT BY REMOVING THE ACID FROM SOLUTION.
References Cited (Backward Citations)
US2973302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |