US2876217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch ethers containing nitrogen and process for making the same
Assignee: Unilever Bestfoods North America
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Filing: 1956-12-31
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Granted: 1959-03-03
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Paschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:57
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/36; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A PROCESS FOR PREPARING A GELATINIZABLE CATIONIC STARCH ETHER WHICH COMPRISES REMOVING SUBSTANTIALLY ALL OF THE UNREACTED EPICHLOROHYDRIN FROM THE REACTION PRODUCT OF EPICLOROHYDRIN AND A TERTIARY AMINE WHEREIN TWO OF THE GROUPS ATTACHED TO THE NITROGEN ARE METHYL, AND ETHERIFYING STARCH WITH THE RESULTANT REACTION PRODUCT SUBSTANTIALLY FREE OF EPICHLOROHYDRIN, IN CONTACT WITH A STRONGLY ALKALINE CATALYST, THE ETHERIFICATION BEING CARRIED OUT UNDER NON-GELATINIZING CONDITIONS.
References Cited (Backward Citations)
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US2116867A
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US2120513A
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US2131120A
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US2733238A
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US2813093A
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US2802000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |