US2813093A
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Ungelatinized tertiary amino alkyl ethers of amylaceous materials
Assignee: NAT STARCH PRODUCTS Inc
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Filing: 1953-06-10
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Granted: 1957-11-12
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 Caldwell Carlyle Gordon
- 👤 Otto B Wurzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
THE METHOD OF ETHERIFICATION OF STARCH WHICH CONSISTS IN REACTING UNGELATINIZED STARCH IN AN ALKALINE MEDIUM, THE ALKALI BEING PRESENT IN AN AMOUNT TO AVOID GELATINIZATION OF THE STARCH GRANULES, WITH AN ETHERIFYING AGEENT CONTAINING A TERTIARY AMINO RADICAL THEREBY INTRODUCING THE TERTIARY AMINO RADICAL INTO THE STARCH THROUGH THE ETHER LINKAGE FORMED BY THE REACTION OF THE ETHERIFYING AGENT AND HYDROXYL GROUPS OF THE STATCH AND THEREBY
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |