US2837438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloidal systems of cyanoethylated starch and their use
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-01-03
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Granted: 1958-06-03
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Expires: 1976-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas E Sample
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:04
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A COMPOSITION CONSISTING ESSENTIALLY OF A COLLOIDAL DISPERSION OF A CYANOETHYL ETHER OF STARCH CONTAINING FROM ABOUT 1.5 TO ABOUT 2.0 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT, IN A SOLVENT MIXTURE OF WATER AND A KETONE CHOSEN FROM THE GROUP CONSISTING OF THE WATERMISCIBLE, LOW-MOLECULAR-WEIGHT, ALIPHATIC AND ALICYLIC KETONES, WATER BEING PRESENT IN A MINIMUM AMOUNT VARYING FROM ABOUT 1% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 2.0 CYANOTHYL ETHER GROUPS PER GLUCOSE UNIT TO A MINIMUM AMOUNT OF ABOUT 12% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 1.5 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT AND IN A MAXIMUM ANOUNT VARYING FROM ABOUT 49% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 2.0 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT TO A MAXIMUM AMOUNT OF ABOUT 55% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 1.5 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT.
Claim 2
Dependent Claim
151 words
A COMPOSITION CONSISTING ESSENTIALLY OF A COLLOIDAL DISPERSION OF A CYANOETHYL ETHER OF STARCH CONTAINING FROM ABOUT 1.5 TO ABOUT 2.0 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT, IN A SOLVENT MIXTURE OF WATER AND A KETONE CHOSEN FROM THE GROUP CONSISTING OF THE WATERMISCIBLE, LOW-MOLECULAR-WEIGHT, ALIPHATIC AND ALICYLIC KETONES, WATER BEING PRESENT IN A MINIMUM AMOUNT VARYING FROM ABOUT 1% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 2.0 CYANOTHYL ETHER GROUPS PER GLUCOSE UNIT TO A MINIMUM AMOUNT OF ABOUT 12% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 1.5 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT AND IN A MAXIMUM ANOUNT VARYING FROM ABOUT 49% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 2.0 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT TO A MAXIMUM AMOUNT OF ABOUT 55% BY WEIGHT OF SOLVENT MIXTURE FOR A STARCH CONTAINING ABOUT 1.5 CYANOETHYL ETHER GROUPS PER GLUCOSE UNIT.
References Cited (Backward Citations)
US2316129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |