US3682952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5(6)-n-butyl-2-carbomethoxy-benzimidazole
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1970-05-19
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Granted: 1972-08-08
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Expires: 1990-05-19
Abstract
Abstract Anthelmintic compositions comprising esters of benzimidazolyl carbamic acids, and their trio analogs, both of which may be optionally substituted on the benzene ring, are disclosed. A process for their preparation involves reacting cyanamide in a suitable organic solvent with the appropriate alkyl substituted haloformate to form a cyanocarbamate, followed by the addition of an o-phenylenediamine to yield the described anthelmintic agents.
Inventors
- 👤 Philip Paul Actor
- 👤 Joseph Frank Pagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:53
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2920994A
Cited
US2933502A
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US2933504A
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US3010968A
Cited
US3541213A
Cited
US3480642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |