US3681093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making edible collagen casings
Assignee: Devro Inc
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Filing: 1970-06-11
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Granted: 1972-08-01
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Expires: 1990-06-11
Abstract
Abstract FLUID AQUEOUS DISPERSIONS OF FRESH HIDE COLLAGEN FOR EXTRUSION INTO CASINGS SUCH AS FOR PORK SAUSAGES AND WIENERS ARE TREATED UNDER ACID CONDITIONS WITH AN ENZYME PRODUCED FROM THE GENUS ASPERGILLUS AND THEN INCUBATED PRIOR TO EXTRUSION. AFTER EXTRUSION, THE ENZYME IN THE CASING IS INACTIVATED BY TREATING THE CASING WITH AN ALKALINE SOLUTION.
Inventors
- 👤 Toshio Tsuzuki
- 👤 Emanuel R Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:21
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |