US3574843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,4-dihydropyridine derivatives for the treatment of angina pectoris
Assignee: Bayer AG
•
Filing: 1969-05-29
•
Granted: 1971-04-13
•
Expires: 1989-05-29
Abstract
Abstract PHARMACEUTICAL COMPOSITIONS FOR THE TREATMENT OR PROPHYLACTIC PREVENTION OF CORONARY INSUFFICIENCY AND ANGINA PECTORIS IN WHICH THE ACTIVE THERAPEUTIC AGENT IS A 1,4-DIHYDROPHYRIDINE DERIVATIVE OF THE FORMULA: 2,6-DI(R-),3,5-DI(R''-OOC-),4-X-1,4-DIHYDROPYRIDINE WHEREIN: R IS HYDROGEN OR ALKYL OF 1 TO 3 CARBON ATOMS, R'' IS LOWER ALKOXY LOWER ALKYL, HYDROXY LOWER ALKYL, FURFURYL OR TETRAHYDROFURFURYL, AND X IS PYRIDYL, PHENYL, OR NITROPHENYL, OR A PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALT THEREOF IN COMBINATION WITH A PHARMACEUTICALLY ACCEPTABLE NONTOXIC CARRIER. SAID 1,4-DIHYDROPYRIDINES OR PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALTS THEREOF ARE ADMINISTERED TO HUMANS.
Inventors
- 👤 Friedrich Bossert
- 👤 Wolf Vater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/90
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |