US3644346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dibenzoxazepine semicarbazones
Assignee: GD Searle LLC
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Filing: 1969-10-27
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Granted: 1972-02-22
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Expires: 1989-10-27
Abstract
Abstract SEMICARBAZONES OF DIBENZOXAZEPINE-N-CARBOXYLIC ACID HYDRAZIDES AND RELATED COMPOUNDS ARE DESCRIBED HEREIN. THE COMPOUNDS ARE USEFUL AS ANTI-ULCER AGENTS, ANTI-PROTOZOAL AGENTS, AND ANTI-ALGAL AGENTS. THEY ARE PREPARED BY THE REACTION OF THE APPROPRIATE ALDEHYDE WITH A SEMICARBAZIDE.
Inventors
- 👤 John W Cusic
- 👤 William E Coyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
C; C07; C07D; C07D267/00; C07D267/02; C07D267/08; C07D267/12; C07D267/16; C07D267/20
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |