Patent US2891056A successfully refreshed from Google Patents.
US2891056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble allyl ethyl cellulose and its preparation
Assignee: Hercules Powder Co
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Filing: 1956-12-05
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Granted: 1959-06-16
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Romeo B Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/187; C08B11/193
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS OF PREPARING A WATER-SOLUBLE ORGANOINSOLUBLE ALLYL ETHYL CELLULOSE WHICH IS STABLE TO PREMATURE INSOLUBILIZATION IN WATER BUT WHICH WHEN DESIRED FOR MAKING FILMS AND OTHER MATERIALS IS IRREVERSIBLY INSOLUBILIZED BY HEATING IN THE PRESENCE OF AN OXIDIZING AGENT THEREFOR, WHICH PROCESS COMPRISES REACTING ALKALI CELLULOSE WITH AN ALLYL HALIDE AND AN ETHYL HALIDE AT A TEMPERATURE OF 90*C.-140*C FOR 1-4 HOURS UNTIL THE ALLYL ETHYL CELLULOSE PRODUCT CONTAINS 0.05-0.5 ALLYL GROUP AND 0.5-1.5 ETHYL GROUPS PER ANHYDROGLUCOSE UNIT OF CELLULOSE.
Claim 2
Dependent Claim
82 words
A PROCESS OF PREPARING A WATER-SOLUBLE ORGANOINSOLUBLE ALLYL ETHYL CELLULOSE WHICH IS STABLE TO PREMATURE INSOLUBILIZATION IN WATER BUT WHICH WHEN DESIRED FOR MAKING FILMS AND OTHER MATERIALS IS IRREVERSIBLY INSOLUBILIZED BY HEATING IN THE PRESENCE OF AN OXIDIZING AGENT THEREFOR, WHICH PROCESS COMPRISES REACTING ALKALI CELLULOSE WITH AN ALLYL HALIDE AND AN ETHYL HALIDE AT A TEMPERATURE OF 90*C.-140*C FOR 1-4 HOURS UNTIL THE ALLYL ETHYL CELLULOSE PRODUCT CONTAINS 0.05-0.5 ALLYL GROUP AND 0.5-1.5 ETHYL GROUPS PER ANHYDROGLUCOSE UNIT OF CELLULOSE.
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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |