US3736351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermediates for tricyclic amines
Assignee: F Hoffmann La Roche AG
•
Filing: 1970-04-23
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Granted: 1973-05-29
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Expires: 1990-04-23
Abstract
Abstract N-ALKYLIDENE OR ARALKYLIDENE-M-ALKYL-M-(3-(SUBSTITUTED DIBENZO(A,D)CYCLOHEPTENE-5-YL)PROPYL) AMMONIUM SALTS AND THEIR PREPARATION ARE DISCLOSED, SUCH SALTS POSSESSING UTILITY AS INTERMEDIATES IN THE PREPARATION OF 5-(AMINOPROPYLIDENE)-DIBENZO(A,D)CYCLOHEPTENES HAVING ANTIDEPRESSANT ACTIVITY.
Inventors
- 👤 Bellet G Rey
- 👤 H Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:45
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/01; C07C211/26; C07C211/31; C07C211/32; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/32
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |