US3833655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-dibenzo(a,d)cyclohepta(1,4)dien-5-one compounds
Assignee: F Hoffmann La Roche AG
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Filing: 1972-08-25
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Granted: 1974-09-03
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Expires: 1992-08-25
Abstract
Abstract 2,3;3A,12B - TETRAHYDRO-8H-DIBENZO(3,4;6,7)CYCLOHEPT (1,2-D)OXAZOLES AND DIBENZO(A,D)CYCLOHEPT(1,4)DIENES BEARING FOR EXAMPLE, SUBSTITUENTS AT THE 10- AND 11-POSITIONS, ARE PREPARED, INTER ALIA, FROM THE CORRESPONDING DIBENZOCYCLOHEPTATRIENONES. THE PRODUCTS ARE USEFUL AS ANTIDEPRESSANTS.
Inventors
- 👤 A Edenhofer
- 👤 H Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07C; C07C243/00; C07C49/00; C07C49/587; C07C49/703; C07C49/747; C07D303/00; C07D303/02; C07D303/12; C07D303/32
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |