Patent US2797911A successfully refreshed from Google Patents.
US3833746A
Expired / Lapsed
US
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Process for tanning edible collagen casing
Assignee: Continental Group Inc
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Filing: 1973-01-08
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Granted: 1974-09-03
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Expires: 1993-01-08
Abstract
Abstract AN IMPROVED PROCESS FOR TANNING AN EDIBLE COLLAGEN MEAT CASING COMPRISES IMMERSING A COAGULATED AND WASHED COLLAGEN CASING, SUBSTANTIALLY FREE OF AMMONIUM SALTS, IN A FIRST BATH SUBSTANTIALLY SATURATED WITH AN ALKALI METAL SALT OF A STRONG ACID, ACIDIFIED TO A PH LESS THAN ABOUT 3, CONTAINING AN EFFECTIVE AMOUNT OF AN EDIBLE, NON-TOXIC ALDEHYDE, AND THEN FIXING THE ALDEHYDE IN THE CASING ON WITHDRAWAL OF THE CASING FROM THE FIRST BATH BY IMMERSING THE CASING IN A SECOND BATH SUBSTANTIALLY SATURATED WITH AN ALKALI METAL SALT OF A STRONG ACID AND MADE ALKALINE TO A PH OF ABOUT 12 OR HIGHER.
Inventors
- 👤 M Cohly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |