US3781353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 5-lower alkanoyl benzophenones utilizing ceric salts
Assignee: F Hoffmann La Roche AG
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Filing: 1971-09-08
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Granted: 1973-12-25
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Expires: 1991-09-08
Abstract
Abstract THE PRESENT INVENTION RELATES TO PRECESSES FOR THE PREPARATION OF 7-LOWER ALKANOYL-1,4-BENZODIAZEPIN-2-ONES UTILIZING CERIC SALTS. THE 7-LOWER ALKANOYL BENZODIAZEPIN2-ONES ARE KNOWN TO BE USEFUL AS MUSCLE RELAXANTS, SEDATIVES AND ANTICONVULSANTS.
Inventors
- 👤 Fong Ning R Ye
- 👤 L Sternbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:12
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/24; C07C; C07C233/00
Claims Analysis
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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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |