Patent US3729474A successfully refreshed from Google Patents.
US3729474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(aryl-lower alkyl)-n'-phenylpiperazines and salts
Assignee: C.H. Boehringer Sohn AG and Co KG
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Filing: 1971-01-28
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Granted: 1973-04-24
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Expires: 1991-01-28
Abstract
Abstract WHEREIN AR IS 3,4-METHYLENEDIOXY-PHENYL, INDANYL, NAPHTHYL OR 1,4-BENZODIOXANYL, AND R1 AND R2 ARE EACH HYDROGEN, HALOGEN, AMMINO, ACETYLAINO, TRIFLUOROMETHYL, ALKYL OF 1 TO 4 CARBON ATOMS, ALKOXY OF 1 TO 4 CARBON ATOMS, ALKYLCARBONYL OF 1 TO 4 CARBON ATOMS OR ALKYLTHIO OF 1 TO 4 CARBON ATOMS, AND NON-TOXIC, PHARMACOLOGICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF, THE COMPOUNDS ARE USEFUL AS CENTRAL NERVOUS SYSTEM DEPRESSANTS. 1-(AR-CH2-CH(-CH3)-),4-(R1,R2-PHENYL)-PIPERAZINE RACEMIC AND OPTICALLY ACTIVE N-(1-BICYCLIC ARYLOPROPYL2)-''-PHENYL-PIPERAZINES OFTHE FORMULA
Inventors
- 👤 A Mentrup
- 👤 K Zeile
- 👤 P Danneberg
- 👤 K Schromm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:56
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/03; A; A61; A61K; A61K31/00; C07D295/04; C07D295/06; C07D295/067; C07D295/08; C07D295/084; C07D295/092; C07D295/10; C07D295/104; C07D295/108
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |