Patent US3655644A successfully refreshed from Google Patents.
US3655644A
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US
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Derivatized starch thinning with hydrogen peroxide
Assignee: Grain Processing Corp
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Filing: 1970-06-03
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Granted: 1972-04-11
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Expires: 1990-06-03
Abstract
Abstract THINNING OF DERIVATIZED STARCH IS ACCOMPLISHED WITH THE USE OF HYDROGEN PEROXIDE UNDER ALKALINE CONDITIONS REQUIRED FOR THE DERIVATIZATION. THE TEMPERATURE AT WHICH THINING OF DERIVATIZED STARCHES IS ACCOMPLISHED WITH THE USE OF HYDROGEN PEROXIDE IS IN THE RANGE OF 80* TO 130*F. AND AT A PH IN THE RANGE OF 7.0 TO 12.0. A CATALYTIC MATERIAL SUCH AS COPPER ION IS USED IN THE AMOUNT OF 5 PARTS TO 100 PARTS PER MILLION BASED ON THE WEIGHT OF STARCH TO ASSIST THE THINNING ACTION OFTHE HYDROGEN PEROXIDE.
Inventors
- 👤 Harry Walter Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:39
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04; C08B30/00; C08B30/12
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |