Patent US3293237A successfully refreshed from Google Patents.
US3293237A
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Process of solubilizing native collagen by reacting said collagen with a stoichiometric amount of a mineral acid
Assignee: Individual
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Filing: 1962-11-30
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Granted: 1966-12-20
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Charles J W Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:50
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016; C; C08; C08H; C08H1/00; C08H1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PRODUCING A COLLAGEN SOL CONSISTING OF REACTING COLLAGEN IN THE NATURAL STATE IN AQUEOUS MEDIUM WITH A STOICHIOMETRIC QUANTITY OF MINERAL ACID TO PRODUCE A COLLAGEN SALT PERMITTING THE REACTION TO CONTINUE UNTIL THE FORMATION OF THE COLLAGEN SALT OF THE MINERAL ACID IS SUBSTANTIALLY COMPLETE, ADJUSTING THE WATER CONTENT TO PROVIDE A CONCENTRATION OF ABOUT FROM 1% TO 4% COLLAGEN SALT IN THE AQUEOUS MEDIUM, WARMING THE AQEUOUS COLLAGEN SALT AND MAINTAINING IT AT A TEMPERATURE OF AT LEAST ABOUT 30*C. WHILE PHYSICALLY DISPERSIDE THE COLLAGEN SALT IN THE AQUEOUS MEDIUM TO PRODUCE A COLLGEN SOL.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PRODUCING A COLLAGEN SOL CONSISTING OF REACTING COLLAGEN IN THE NATURAL STATE IN AQUEOUS MEDIUM WITH A STOICHIOMETRIC QUANTITY OF MINERAL ACID TO PRODUCE A COLLAGEN SALT PERMITTING THE REACTION TO CONTINUE UNTIL THE FORMATION OF THE COLLAGEN SALT OF THE MINERAL ACID IS SUBSTANTIALLY COMPLETE, ADJUSTING THE WATER CONTENT TO PROVIDE A CONCENTRATION OF ABOUT FROM 1% TO 4% COLLAGEN SALT IN THE AQUEOUS MEDIUM, WARMING THE AQEUOUS COLLAGEN SALT AND MAINTAINING IT AT A TEMPERATURE OF AT LEAST ABOUT 30*C. WHILE PHYSICALLY DISPERSIDE THE COLLAGEN SALT IN THE AQUEOUS MEDIUM TO PRODUCE A COLLGEN SOL.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |