Patent US4136116A successfully refreshed from Google Patents.
US4136116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic compounds
Assignee: Hoffmann La Roche Inc
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Filing: 1975-03-14
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Granted: 1979-01-23
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Expires: 1995-03-14
Abstract
Abstract 1-Methyl(or acetyl)-5H-dibenzo[a,d]cycloheptenes and 1-methyl(or acetyl)-10,11-dihydro-5H-dibenzo[a,d]cycloheptenes bearing a basic side chain at the 5-position, such as a 3-mono- or dimethylaminopropylidene, a 3-mono- or dimethylaminopropyl or a 3-dimethylaminopropylidene(or propyl)-N-oxide, intermediates and processes for their preparation, are described. The end products are useful antidepressants.
Inventors
- 👤 Emilio Kyburz
- 👤 Hans Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:04
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/32; C07C65/38; C07C13/00; C07C13/28; C07C13/32; C07C13/54; C07C13/547; C07C63/00; C07C63/33; C07C63/331; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
The compound, 1-methyl-5-(3-dimethylaminopropylidene)-5H-dibenzo[a,d]cycloheptene-N-oxide.
Claim 2
Dependent Claim
3 words
The compound, 1-methyl-5-(3-dimethylaminopropylidene)-5H-dibenzo[a,d]cycloheptene-N-oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |