US3749680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel derivatives of isoascorbic acid and methods of producing and using same
Assignee: Merck and Co Inc
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Filing: 1971-01-08
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Granted: 1973-07-31
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Expires: 1991-01-08
Abstract
Abstract NOVEL ISOASCORBIC ACID PHOSPHATES AND SALTS THEREOF, USEFUL AS ANTIOXIDANTS, ARE PREPARED BY PHOSPHORYLATING 5,6-O-LOWERALKYLIDENE ISOASCORBIC ACID. ALSO, ANTIOXIDANT COMPOSITIONS AND METHODS OF INHIBITING OXIDATION IN PRESERVED FOODS AND BEVERAGES ARE INCLUDED.
Inventors
- 👤 D Hinkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:47
CPC Classifications
C; C12; C12H; C12H1/00; A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/775; A23B7/00; A23B7/08; A23B7/085; A23L; A23L13/00; A23L13/40; A23L13/42; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/65515
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |