US3794651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(omega-(4-phenylpiperazinyl)alkyl)-2-methylbenzimidazoles
Assignee: AH Robins Co Inc
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Filing: 1971-07-19
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Granted: 1974-02-26
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Expires: 1991-07-19
Abstract
Abstract 1 - OMEGA-(4-PHENYLPIPERAZINYL!-2-METHYBENZIMIDAZOLES USEFUL AS BRONDCHODILATORS ARE DISCLOSED. THE COMPOUNDS ARE PREPARED FROM 1-(OMEGA-HALOALKYL)-2METHYLBENZIMIDAZOLES BY REACTING THEM WITH 4-PHENYLPIPERAZINES.
Inventors
- 👤 G Helsley
- 👤 W Welstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/04; C07D207/08; C07D207/06; C07D207/10; C07D207/12; C07D207/18; C07D207/20; C07D207/22; C07D207/24; C07D207/26
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |