US3446806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 1,4-benzodiazepine 4-oxides
Assignee: F Hoffmann La Roche AG
•
Filing: 1966-01-19
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Granted: 1969-05-27
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Expires: 1986-01-19
Abstract
No abstract record available.
Inventors
- 👤 Giles A Archer
- 👤 Leo Henryk Sternbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:31
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/74; C07C; C07C249/00; C07C249/04; C07D239/76; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/20; C07D243/24; C07D401/00; C07D401/02; C07D401/06; C07D403/00; C07D403/02; C07D403/06; C07D413/00; C07D413/02; C07D413/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3267110A
Cited
US3297698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |