US3553193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of oxidizing starch
Assignee: Unilever Bestfoods North America
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Filing: 1968-04-10
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Granted: 1971-01-05
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Expires: 1988-04-10
Abstract
Abstract COVERS A METHOD OF PREPARING CARBONYL-CONTAINING STARCHES. PARTICULARLY COVERS A METHOD OF PREPARING CARBONYL STARCHES BY REACTION OF STARCH WITH EITHER AN ALKALI METAL HYPOBROMITE OR AN ALKALI METAL BROMITE UNDER CAREFULLY CONTROLLED CONDITIONS TO PROVIDE AN OXIDIZED STARCH PRODUCT HAVING A SUBSTANTIALLY GREATER PROPORTION OF CARBONYL GROUPS THAN CARBOXYL GROUPS. ALSO COVERS A METHOD OF SELECTIVELY OXIDIZING SIDE CHAINS OF STARCH DERIVATIVES UNDER THE SAME PROCESS CONDITIONS WHEREBY THE UNDERIVATIZED STARCH HYDROXY RADICALS CONTAINED IN THE ANHYDROGLUCOSE UNITS ARE SUBSTANTIALLY NON-OXIDIZED.
Inventors
- 👤 David H Le Roy
- 👤 Stanley M Parmerter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:44
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |