US3712898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzoheterocyclicalkyl derivatives of 4-(2-keto-1-benzimidazolinyl)-piperidine
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1971-03-10
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Granted: 1973-01-23
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Expires: 1991-03-10
Abstract
Abstract BENZOHETEROCYCLICALKYL DERIVATIVES OF 4-(2-KETO-1-BENZIMIDAZOLINYL)-PIPERIDINE, IN WHICH THE BENZOHETEROCYCLIC MOIETY IS THIANAPHTHENYL OR BENZOFURANYL, OPTIONALLY SUBSTITUTED BY CHLORO, BROMO, FLUORO, METHYL, METHOXY OR TRIFLUOROMETHYL, HAVE NEUROLEPTIC ACTIVITY. THE COMPOUNDS ARE GENERALLY PREPARED FROM EITHER THE BENZOHETEROYCLICALKYL HALIDE BY REACTION WITH THE APPROPRIATE AMINE OR THE BENZOLHETEROCYCLIC AMINE BY CONDENSATION WITH A 5,5-BIS(B-HALOETHYL)BARBITURIC ACID.
Inventors
- 👤 C Kaiser
- 👤 C Zirkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:41
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/14; C07D409/00; C07D409/02; C07D409/06; C07D409/14; C07D471/00; C07D471/02; C07D471/10
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |