US2928827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of propionamide ethers of starch
Assignee: Unilever Bestfoods North America
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Filing: 1958-05-09
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Granted: 1960-03-15
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Expires: 1978-05-09
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Paschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:16
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR MAKING AND RECOVERING PROPIONAMIDE ETHERS OF STARCH HAVING A D.S. OF ABOUT 0.1 TO ABOUT 0.4, IN UNSWOLLEN GRANUULE STATE WHICH COMPRISES REACTING STARCH, UNDER NON-GELATINIZING AND NON-SWELLING CONDITIONS, WITH ACRYLAMIDE IN AQUEOUUS MEDIUM CONTAINING ALKALI AND SODIUM SUULFATE, ADJUUSTING THE PH OF THE REACTION MIXTURE, AFTER COMPLETION OF THE REACTION, TO WITHIN THE RANGE OF ABOUT 2.0 TO ABOUT 4.5, AND WASHING THE STARCH ETHER WITH WATER, AND RECOVERING THE WASHED STARCH ETHER, THE AMOUNT OF ALKALI NOT EXCEEDING 0.1 MOLE PER MOLE OF STARCH AND THE AMOUNT OF SODIUM SULFATE BEING AT LEAST 0.05 MOLE PER MOLE OF STARCH.
Claim 2
Dependent Claim
104 words
A PROCESS FOR MAKING AND RECOVERING PROPIONAMIDE ETHERS OF STARCH HAVING A D.S. OF ABOUT 0.1 TO ABOUT 0.4, IN UNSWOLLEN GRANUULE STATE WHICH COMPRISES REACTING STARCH, UNDER NON-GELATINIZING AND NON-SWELLING CONDITIONS, WITH ACRYLAMIDE IN AQUEOUUS MEDIUM CONTAINING ALKALI AND SODIUM SUULFATE, ADJUUSTING THE PH OF THE REACTION MIXTURE, AFTER COMPLETION OF THE REACTION, TO WITHIN THE RANGE OF ABOUT 2.0 TO ABOUT 4.5, AND WASHING THE STARCH ETHER WITH WATER, AND RECOVERING THE WASHED STARCH ETHER, THE AMOUNT OF ALKALI NOT EXCEEDING 0.1 MOLE PER MOLE OF STARCH AND THE AMOUNT OF SODIUM SULFATE BEING AT LEAST 0.05 MOLE PER MOLE OF STARCH.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |