US3879405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrahydropyridine derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1973-05-21
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Granted: 1975-04-22
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Expires: 1993-05-21
Abstract
Abstract Tetrahydropyridine derivatives and processes for the preparation thereof are disclosed. These tetrahydropyridine compounds are useful as psychosedative agents.
Inventors
- 👤 Albrecht Edenhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:37
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/04; C07D265/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |