US3741871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of immobilized enzymes
Assignee: Monsanto Co
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Filing: 1972-01-04
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Granted: 1973-06-26
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Expires: 1992-01-04
Abstract
Abstract AN ENZYMATICALLY-ACTIVE, WATER INSOLUBLE COMPOSITE COMPRISES FIBROUS CELLULOSE, A POLYMINE COVALENTLY ATTACHED TO THE CELLULOSE BY A CARBAMIC LINKAGE, AND AN ACTIVE ENZYME CROSSLINKED TO THE POLYAMINE BY AN ALKALENE DIAMIDIDE LINKAGE. THE COMPOSITE OF THIS INVENTION IN USEFUL AS A PACKING FOR ENZYME REACTORS.
Inventors
- 👤 L Weeks
- 👤 J Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
D; D06; D06M; D06M16/00; D06M16/003; C; C12; C12N; C12N11/00; C12N11/02; C12N11/10; C12N11/12
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |