Patent US3705891A successfully refreshed from Google Patents.
US3705891A
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Method for producing ungelatinized starch derivatives
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1970-11-04
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Granted: 1972-12-12
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Expires: 1990-11-04
Abstract
Abstract UNGELATINIZED COLD-WATER-SWELLING HYDROXYPROPYLATED STARCH MATERIALS PRODUCED BY REACTING A DRY GRANULAR STARCH MATERIAL DIRECTLY WITH PROPYLENE OXIDE IN THE PRESENCE OF A POLYBASIC, WATER-SOLUBLE SALT OF PHOSPHORIC ACID. THE STARCH DERIVATIVES PRODUCED BY THIS METHOD ARE USEFUL AS FOOD ADDITIVES, FOR CEMENT BINDERS, AND FOR SIMILAR USES IN WHICH A COLD-WATER-SWELLING STARCH DERIVATIVE IS USEFUL.
Inventors
- 👤 John V Tuschhoff
- 👤 Cleo E Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:23
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C04; C04B; C04B24/00; C04B24/24; C04B24/38; C04B24/383; C08B31/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |