Patent US3660425A successfully refreshed from Google Patents.
US3660425A
Expired / Lapsed
US
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Certain 5-amino-4-aroylpyrazoles
Assignee: Parke Davis and Co LLC
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Filing: 1970-03-30
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Granted: 1972-05-02
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Expires: 1990-03-30
Abstract
Abstract 5-AMINO-4-AROLYPYRAZOLE COMPOUNDS, ALSO SUBSTITUTED IN THE 1-AND 3-POSITION BY LOWER ALKYL GROUPS, ACID-ADDITION SALTS THEREOF, AND THEIR PRODUCTION BY (1) REACTING A 4AROYL-5-HALOPYRAZOLE WITH AMMONIA OR METHYLAMINE; (2) HYDROLYZING A 4-AROYL-5-ARYLAMIDOPYRAZOLE; OR (3) REACTING A 5-AMINO-4-CYANOPYRAZOLE WITH AN ARYL ORGANOMETALLIC COMPOUND. THE COMPOUNDS OF THE INVENTION ARE USEFUL AS PHARMACOLOGICAL AGENTS THAT EXERT A DEPRESSANT EFFECT UPON THE CENTRAL NERVOUS SYSTEM AND AS CHEMICAL INTERMEDIATES.
Inventors
- 👤 Horace A De Wald
- 👤 Donald E Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:11
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; C07D231/16; C07D231/18; C07D231/20; C07D231/40; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |