US3833555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysaccharide cyclic carbamate containing compounds
Assignee: OI Glass Inc
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Filing: 1972-10-11
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Granted: 1974-09-03
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Expires: 1992-10-11
Abstract
Abstract NEW COMPOSITIONS OF MATTER COMPRISING MODIFIED POLYSACCHARIDES SUCH AS AGAROSE, DEXTRAN, CELLULOSE, CARRAGHEENAN AND STARCH IN WHICH A MINOR PORTION OF THE HYDROXYL GROUPS ARE SUBSTITUTED BY AN N-(2,5-DIOXO-4OXAZOLIDINYL)-ALKYL CARBAMATE OR N - (2,5 - DIOXO-4OXAZOLIDINYL)-ARALKYL CARBAMATE RADICAL ARE DISCLOSED WHICH ARE USEFUL FOR INSOLUBILIZING ENZYMES.
Inventors
- 👤 M Keys
- 👤 F Semersky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:23
CPC Classifications
C; C08; C08B; C08B37/00; C08B15/00; C08B31/00; 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) | 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 |