US3781314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyene compounds
Assignee: F Hoffmann La Roche AG
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Filing: 1971-07-14
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Granted: 1973-12-25
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Expires: 1991-07-14
Abstract
Abstract THE COMPOUND 5,5-DIMETHYL-CYCLOPENT-1-ENE HAVING AN ACETYL, HYDROXY OR LOWER ALKYL GROUP IN THE 2-POSITION AND 3,7-DIMETHYL-NONA-2,4,6,8-TETRAENOIC ACID OR TETRAENOL DERIVATIVE IN THE 1-POSITION USEFUL AS ANTI-TUMORAGENTS AS WELL AS A METHOD FOR PREPARING THESE COMPOUNDS FROM VITAMIN A ACID DERIVATIVES.
Inventors
- 👤 W Bollag
- 👤 N Rigassi
- 👤 U Schwieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:38
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/511; C07C45/513; C07C45/56; C07C45/57; C07C45/58; C07C45/61; C07C45/67; C07C59/00; C07C59/40; C07C59/76; C07C59/80; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/535; C07F9/5352; C07F9/54; C07F9/5442
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |