Patent US3297459A successfully refreshed from Google Patents.
US3297459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing formed collagen bodies
Assignee: Armour and Co
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Filing: 1965-04-08
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Granted: 1967-01-10
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Expires: 1985-04-08
Abstract
No abstract record available.
Inventors
- 👤 Veis Arthur
- 👤 Cohen Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
D; D01; D01F; D01F4/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE PROCESS OF PREPARING FORMED COLLAGEN BODIES FROM A FLOWABLE MIXTURE OF FINELY-DIVIDED NATIVE COLLAGEN MATERIAL AND RECONSTITUTABLE COLLAGEN SOLUBILIZED IN AN AQUEOUS SOLUTION, COMPRISING THE STEPS OF: (A) FORMING SAID MIXTURE INTO A BODY OF THE DESIRED SHAPE; AND (B) CONTACTING SAID FORMED BODY WITH AN AQUEOUS SOLUTION OF AMMONIUM SULFATE HAVING A PH ABOVE 5.5 UP TO ABOUT 9.0, WHILE SAID SOLUBILIZED COLLAGEN REMAINS TO INTIMATE ASSOCIATION WITH THE NATIVE COLTAGEN MATERIAL OF SAID BODY, THE AMMONIUM SULFATE CONCENTRATE OF SAID SOLUTION BEING SUFFICIENT TO CAUSE SAID SOLUBILIZED COLLAGEN TO RECONSTITUTE TO FIBROUS COLLAGEN HAVING THE CROSS-STRIATIONS OF NATIVE COLLAGEN; WHEREBY A CROSS-LINKED COLLAGEN BODY OF HIGH STRENGTH IS OBTAINED.
Claim 2
Dependent Claim
112 words
THE PROCESS OF PREPARING FORMED COLLAGEN BODIES FROM A FLOWABLE MIXTURE OF FINELY-DIVIDED NATIVE COLLAGEN MATERIAL AND RECONSTITUTABLE COLLAGEN SOLUBILIZED IN AN AQUEOUS SOLUTION, COMPRISING THE STEPS OF: (A) FORMING SAID MIXTURE INTO A BODY OF THE DESIRED SHAPE; AND (B) CONTACTING SAID FORMED BODY WITH AN AQUEOUS SOLUTION OF AMMONIUM SULFATE HAVING A PH ABOVE 5.5 UP TO ABOUT 9.0, WHILE SAID SOLUBILIZED COLLAGEN REMAINS TO INTIMATE ASSOCIATION WITH THE NATIVE COLTAGEN MATERIAL OF SAID BODY, THE AMMONIUM SULFATE CONCENTRATE OF SAID SOLUTION BEING SUFFICIENT TO CAUSE SAID SOLUBILIZED COLLAGEN TO RECONSTITUTE TO FIBROUS COLLAGEN HAVING THE CROSS-STRIATIONS OF NATIVE COLLAGEN; WHEREBY A CROSS-LINKED COLLAGEN BODY OF HIGH STRENGTH IS OBTAINED.
References Cited (Backward Citations)
US3071483A
Cited
US3178301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |