US3884967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic amines and processes for the preparation thereof
Assignee: F Hoffmann La Roche AG
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Filing: 1974-03-08
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Granted: 1975-05-20
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Expires: 1994-03-08
Abstract
Abstract 1-Chloro- or 1-fluoro- derivatives of 5H-dibenzo(a, d)cycloheptenes and 1-chloro- or 1-fluoro- derivatives of 10,11dihydr-5H-dibenzo(a,d)cycloheptenes having, at position 5, a basic exocyclic side chain of the formula WHEREIN R1 is hydrogen or methyl, AND INTERMEDIATES THEREFOR ARE PREPARED BY ALTERNATE PROCEDURES. The described end-products are useful, for example, as psychopharmacological antidepressants.
Inventors
- 👤 Emilio Kyburz
- 👤 Hans Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
C; C07; C07C; C07C63/00; C07C63/68; C07C63/74; C07C51/00; C07C51/16; C07C51/295; C07C63/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US3736351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |