Patent US3766015A successfully refreshed from Google Patents.
US3766015A
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Preservation of bovine stomachs for rennet extraction
Assignee: Pfizer Inc
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Filing: 1972-03-02
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Granted: 1973-10-16
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Expires: 1992-03-02
Abstract
Abstract High recovery yields of rennet are obtained from calf and adult bovine stomachs packed in a solid salt selected from the group consisting of sodium sulfate, potassium sulfate, ammonium chloride and ammonium sulfate, and stored under refrigeration.
Inventors
- 👤 R Dardas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:40
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/64; C12N9/6421; C12N9/6478; C12N9/6481; A; A23; A23B; A23B4/00; A23B4/02; A23B4/06; A23B4/08
Claims Analysis
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |