US3580906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch levulinates
Assignee: RJ Reynolds Tobacco Co
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Filing: 1968-09-25
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Granted: 1971-05-25
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Expires: 1988-09-25
Abstract
Abstract LEVULINATE ESTERS OF STARCH ARE PREPARED BY REACTING STARCH WITH ALPHA-ANGELICA LACTONE UNDER CONTROLLED CONDITIONS OF TEMPERATURE AND PH. THE RESULTING STARCH LEVULINATES MAY BE USED IN FOOD, COSMETIC, ADHESIVES, AND PAPER AND TEXTILE SIZING APPLICATIONS, ETC.
Inventors
- 👤 Edward Bernasek
- 👤 Calley Neil Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:43
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/73; A61K8/732; A61Q; A61Q19/00
Claims Analysis
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |