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US3580909A
Expired / Lapsed
US
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4-styrylpyridines
Assignee: F Hoffmann La Roche AG
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Filing: 1968-12-09
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Granted: 1971-05-25
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Expires: 1988-12-09
Abstract
Abstract 4-STYRYLPYRIDINES, PREPARED BY REACTING APPROPRIATELY SUBSTITUTED PYRIDINES AND AROMATIC ALDEHYDES, ARE DESCRIBED. THE END PRODUCTS ARE USEFUL AS ANTICONVULSANTS.
Inventors
- 👤 Hanns Hanina Lehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:12
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/24; C07D213/26; C07D213/28; C07D213/30; C07D213/32; C07D213/34; C07D213/36; C07D213/38; C07D213/54; C07D213/56
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |