US3634431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylated and alkylated derivatives of 2-aminohexahydrobenzo(a)quinolizines
Assignee: Bayer Corp
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Filing: 1969-12-22
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Granted: 1972-01-11
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Expires: 1989-12-22
Abstract
Abstract ACYLATED AND ALKYLATED DERIVATIVES OF 2-AMINOHEXAHYDROBENZO(A)QUINOLIZINE AND PHARMACOLOGICALLY ACCEPTABLE SALTS THEREOF THAT ARE USEFUL AS ANTIHYPERTENSIVE AGENTS. PREPARED BY REACTING 2-OXO-1,3,4,6,7,11B-HEXAHYDRO-2HBENZO(A)QUINOLIZINE WITH AN AMINE TO FORM A SCHIFF BASE WHICH IS THEN REDUCED. THE AMINE IS ACYLATED OR ALKYLATED WITH A HALIDE OR AN ANHYDRIDE.
Inventors
- 👤 John William Van Dyke Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:32
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D455/00; C07D455/03; C07D455/04; C07D455/06; C07D401/00; C07D401/02; C07D401/12
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |