US2500950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ungelatinized starch ethers from polyfunctional etherifying agents
Assignee: NAT STARCH PRODUCTS Inc
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Filing: 1945-12-29
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Granted: 1950-03-21
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Konigsberg Moses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:25
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/003; H; H01; H01M; H01M6/00; H01M6/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
THE METHOD WHICH CONSISTS IN REACTING UNGELATINIZED STARCH WITH AN ETHER FORMING REAGENT IN THE PRESENCE OF AN ALKALINE MEDIUM, UNDER CONDITIONS WHICH DO NOT EFFECT GELATINIZATION OF THE STARCH, SAID ETHER FORMING REAGENT CONTAINING AT LEAST TWO FUNCTIONAL GROUPS WHICH FORM ETHER LINKAGES WITH AT LEAST TWO HYDROXYL GROUPS OF THE STARCH MOLECULES, AND THEREBY PRODUCING A MODIFIED STARCH IN THE PHYSICAL FORM OF UNGELATIZED STARCH GRANULES HAVING THE PROPERTY OF INHIBITED GELATINIZATION WHEN DISPERSED IN WATER UNDER NORMAL GELATINIZATION CONDITIONS.
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |