US3726897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2,3,8-tetrahydrodibenzo(3,4:6,7)cyclohepta(1,2-c)pyrroles as cns-depressants
Assignee: Novartis Corp
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Filing: 1971-05-19
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Granted: 1973-04-10
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Expires: 1991-05-19
Abstract
Abstract COMPOUNDS OF THE CLASS OF 1,2,3,8-TETRAHYDRODIBENZO (3,4:6,7)CYCLOHEPTA(1,2-C)PYRROLE WHICH MAY BE SUBSTITUTED IN THE 2-POSITION BY AN ALKYL GROUP AND/OR IN THE 5-POSITION BY CHLORINE OR THE METHYL OR THE METHOXY GROUP RESPECTIVELY AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF HAVE A DEPRESSANT EFFECT ON THE CENTRAL NERVOUR SYSTEM, THEY CAN BE PREPARED FROM THE CORRESPONDING 10,11 - BISBROMOMETHYL-5H-DIBENZO(A,D)CYCLOHEPTENES AND A PRIMARY AMINE, THE COMPOUNDS ARE ACTIVE INGREDIENTS OF PHARMACEUTICAL COMPOSITIONS.
Inventors
- 👤 L Gysin
- 👤 W Schindler
- 👤 J Gosteli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07C; C07C57/00; C07C57/30; C07C57/38; C07C57/52; C07C57/58; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07D209/70; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/32
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |