US3658822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of (benzimidazolyl-2-methyl) piperazine and their process of preparation
Assignee: CLAUDE P FAURAN
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Filing: 1969-06-25
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Granted: 1972-04-25
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Expires: 1989-06-25
Abstract
Abstract IN WHICH R IS AN ALIPHATIC RADICAL HAVING 1 TO 10 CARBON ATOMS, WHICH MAY BE SUBSTITUTED BY ONE OR MORE OF HYDROXYL, ALKOXYCARBOXYL, ARYL, CARBOXYL AND CARBAMOYL IN WHICH THE NITROGEN MAY BE SUBSTITUTED OR FORM PART OF A HETEROCYCLIC RING. THE COMPOUNDS ARE PREPARED BY REACTING 2-CHLOROMETHYL BENZIMIDAZOLE WITH A MONOSUBSTITUTED PIPERAZINE IN AN ACETONIC MEDIUM IN THE PRESENCE OF AN ALKALI OR ALKALINE EARTH METAL CARBONATE. THE COMPOUNDS EXHIBIT CARDIOTROPIC ACTIVITY, ANALGESIC ACITVITY, SEDATIVE ACTIVITY AND SPASMOLYTIC ACTIVITY. COMPOUNDS OF THE FORMULA 2-((4-R-PIPERAZIN-1-YL)-CH2-)-2,3-DIHYDROBENZIMIDAZOLE
Inventors
- 👤 Claude P Fauran
- 👤 Guy M Raynaud
- 👤 Jeannine A Eberle
- 👤 Janine M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:07
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/86
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) | 1975-04-25 | 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 |