Patent US5772678A successfully refreshed from Google Patents.
Patent US2516633A successfully refreshed from Google Patents.
US2516633A
Expired / Lapsed
US
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Preparation of starch ethers in original granule form
Assignee: Penick and Ford Ltd Inc
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Filing: 1947-04-10
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Granted: 1950-07-25
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 Carl C Kesler
- 👤 Erling T Hjermstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
IN A PROCESS OF THE CHARACTER SET FORTH, THE STEPS OF REACTING UNSWOLLEN GRANULE STARCH UNDER NON-SWELLING CONDITIONS WITH AN ALKYLENE OXIDE IN WHICH THE OXYGEN IS LINKED TO ADJACENT CARBON HYDROGEN GROUPS, IN A WATER SUSPENSION CONTAINING A WATER-SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF THE SALT OF AN ALKALI METAL AND AN ALKALINE EARTH METAL AND SOLUBLE ALKALI YIELDING A HYDROXYL ION CONCENTRATION PROMOTING THE REACTION BETWEEN STARCH AND THE ALKYLENE OXIDE, AND FILERING AND DRYING THE STARCH WHILE MAINTAINING THE HYDROXYL ION CONCENTRATION BELOW THAT AT WHICH SWELLING OF THE STARCH OCCURS.
References Cited (Backward Citations)
US2116867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |