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US3658821A
Expired / Lapsed
US
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1-(p-fluorobutyrophenonyl) piperazines
Assignee: Synthelabo SA
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Filing: 1969-02-19
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Granted: 1972-04-25
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Expires: 1989-02-19
Abstract
Abstract 1-((4-F-PHENYL)-CO-CH2-CH2-CH2-),4-R-PIPERAZINE IN WHICH R IS (1) A SATURATED ALKYL RADICAL CONTAINING 1 TO 4 CARBON ATOMS OR (2) AN ARALKYL RADICAL CONTAINING NOT MORE THAN 10 CARBON ATOMS, OR (3) A -(CH2)N-COOR'' RADICAL WHEREIN N=0, 1 OR 2, AND R'' IS AN ALIPHATIC GROUP CONTAINING 1 TO 4 CARBON ATOMS, OR A CYCLOALIPHATIC RADICAL OR AN ARALIPHATIC RADICAL. THE COMPOUND IS MADE BY REACTING PIPERAZINE WITH A HALOGENOBUTYROPHENONE UNDER REFLUX IN THE PRESENCE OF AN ORGANIC SOLVENT AND AN ALKALI. 1-(P-FLUOROBUTYROPHENONYL) PIPERAZINES OF THE FORMULA
Inventors
- 👤 Claude P Fauran
- 👤 Michel J Turin
- 👤 Guy M Raynaud
- 👤 Claude C Gouret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:05
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205; C07D295/04; C07D295/10; C07D295/104; C07D295/108; C07D295/12; C07D295/125; C07D295/13
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |