US3795709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzobenzazulenes
Assignee: Sandoz AG
•
Filing: 1970-04-15
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Granted: 1974-03-05
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Expires: 1990-04-15
Abstract
Abstract 2-AMINO- 1,2,6,7- TETRAHYDRO -(11BH) - BENZO(J)BENZ(C,D)AZULENES ARE USEFUL AS ANTIHYPERTENSIVES AND USEFUL AS SEDATIVE-TRANQUILIZERS, SUCH FINAL COMPOUNDS ARE PREPARED FROM SUITABLE, 10,11-DIHYDRO-5H-DIBENZOL(A,D) CYCLOHEPTEN-5-ONES OR SUITABLE 1,2-DIPHENYL-ETHANES, E.G., BY CONVERSION THEREOF TO THE CORRESPONDING 1,2,6,7-TETRAHYDRO-(11BH)-BENZO (J)BENZ(C,D)AZULE-2-ONE WHICH IS THEN EITHER CONVERTED TO THE CORRESPONDING FINAL COMPOUND, OR TO A 2-HYDROXY, 2-HALO OR 2-OXIME INTERMEDIATE WHICH IS SUBSEQUENTLY CONVERTED TO THE CORRESPONDING FINAL COMPOUND.
Inventors
- 👤 A Frey
- 👤 E Galantay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:04
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/033; C07C; C07C57/00; C07C57/46; C07C57/50; C07C57/52; C07C57/62; C07C59/00; C07C59/40; C07C59/58; C07C59/72; C07C2603/00; C07C2603/02; C07C2603/40
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |