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Patent US3291791A successfully refreshed from Google Patents.
US3291791A
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Process for preparing 3-lower alkanoyloxy and 3-benzoyl-oxy 5-phenyl-1, 3-dihydro-2h-1, 4-benzo-diazepin-2-ones
Assignee: F Hoffmann La Roche AG
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Filing: 1964-06-23
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Granted: 1966-12-13
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Reeder Earl
- 👤 Sternbach Leo Henryk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:26
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |