US3746730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of polyene acids
Assignee: F Hoffmann La Roche AG
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Filing: 1970-12-17
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Granted: 1973-07-17
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Expires: 1990-12-17
Abstract
Abstract A PROCESS FOR PREPARING POLYENE ACIDS FROM POLYENE ALCOHOLS OR ESTERS THEREOF BY A SINGLE OXIDATION REACTION BY SILVER(1)OXIDE IN THE PRESENCE OF AN ALKALI.
Inventors
- 👤 R Marbet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:41
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/20; A; A61; A61K; A61K31/00; A61K31/59; C07C51/00; C07C51/16; C07C2601/00; C07C2601/12; C07C2601/16
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |