US3763233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-substituted-hexahydro pleiadenes
Assignee: Sandoz AG
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Filing: 1971-08-17
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Granted: 1973-10-02
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Expires: 1991-08-17
Abstract
Abstract HEXAHYDRO PLEIADENES SUBSTITUTED AT THE SEVEN POSITION, E.G., 1,2,3,7,12,12A -HEXAHYDRO -7- CARBOXAMIDO PLEIADENE, AND DIBENZOHEPTALENES SUBSTITUTED AT THE 8-POSITION, E.G., 1,2,3,4 -TETRAHYDRO -8- (1- METHYL -4- PIPERIDYL)8H-DIBENZO(B,EF)HEPTALENE, PREPARED FROM CORRESPONDING 7-SUBSTITUTED-HEXAHYDRO PLEIADENES AND 8-SUBSTITUTED DIBENZOHEPTALENES, ARE USEFUL AS ANTI-CONVULSANTS.
Inventors
- 👤 W Houlihan
- 👤 J Nadelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:17
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/17; C07C63/00; C07C63/33; C07C63/49
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |