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US3706633A
Expired / Lapsed
US
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Preparation of water-insoluble enzyme derivatives
Assignee: Monsanto Co
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Filing: 1970-04-10
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Granted: 1972-12-19
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Expires: 1990-04-10
Abstract
Abstract WATER-INSOLUBLE, ENZYMATICALLY-ACTIVE COMPOSITIONS COMPRISE DIALDEHYDE STARCH, AN ACTIVE ENZYME, AND AN ALKYLENE DIAMINE BINDING SAID ENZYME TO SAID STARCH. THE COMPOSITIONS ARE PREPARED BY CONDENSING DIALDEHYDE STARCH WITH ALKYLENE DIAMINE, REDUCING AND DIAZOTZING THE RESULTING POLYMERIC PRODUCT TO PRODUCE A POLYMERIC POLYDIAZONIUM SALT, AND THEREAFTER COUPLING THE ENZYME TO SAID POLYDIAZONIUM SALT.
Inventors
- 👤 Ephraim Katchalski
- 👤 Leon Goldstein
- 👤 Yehuda Levin
- 👤 Shmaryahu Blumberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02; C12N11/10
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |