Patent US3790688A successfully refreshed from Google Patents.
US3790688A
Expired / Lapsed
US
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Water dispersible beta-carotene
Assignee: United States Department of Agriculture
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Filing: 1972-03-15
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Granted: 1974-02-05
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Expires: 1992-03-15
Abstract
Abstract A PROCESS FOR PREPARING WATER DISPERSIBLE B-CAROTENE BY SLOWLY ADDING ETHER ETHANOL SOLUTION OF B-CAROTENE TO BOILING SOLUTIONS OF SOLUBLE STARCH WITH RAPID STIRRING AND THEN PRECIPITATING THE STARCH CAROTENE COLLOID WITH METHANOL OR ETHANOL AND RECOVERING THE WATER DISPERSIBLE PRECIPITATE.
Inventors
- 👤 W Walter
- 👤 A Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:36
CPC Classifications
A; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/43; A23L5/44
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |