Patent US3818008A successfully refreshed from Google Patents.
US3818008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-phenylhexahydro-pyridazines
Assignee: Sandoz AG
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Filing: 1972-01-27
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Granted: 1974-06-18
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Expires: 1992-01-27
Abstract
Abstract The invention discloses novel process for preparation of Nsubstituted cycloalkanoindoles including novel compounds of said type exhibiting pharmaceutical activity in animals and also useful as intermediates. Also disclosed are novel 1phenylhexahydropyridazines useful as intermediates in the process.
Inventors
- 👤 M Eberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:14
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
The compound of claim 1 in which R* is hydrogen and R2'' is methyl.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |