US3637675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperidyl and pyridyl compounds
Assignee: F Hoffmann La Roche AG
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Filing: 1968-09-26
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Granted: 1972-01-25
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Expires: 1988-09-26
Abstract
Abstract PIPERIDYL COMPOUNDS AND DERIVATIVES WHICH ARE USEFUL AS ANTICONVULSANTS AND ALSO AS INTERMEDIATES IN THE PREPARATION OF RELATED PIPERIDYL COMPOUNDS OF PHARMACOLOGICALLY IMPORTANT ACTIVITY.
Inventors
- 👤 Bernard Brust
- 👤 Rodney Ian Fryer
- 👤 Leo Henryk Sternbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:25
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/10; C07D211/12; C07D211/14; C07D211/18; C07D211/20; C07D211/22
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |