Patent US2131797A successfully refreshed from Google Patents.
Patent US3402171A successfully refreshed from Google Patents.
US3402171A
Expired / Lapsed
US
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Process for preparing 5-aryl-3h-1, 4-benzodiazepin-2(1h)-ones
Assignee: CURACAO PHARMHOLDING NV
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Filing: 1963-11-27
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Granted: 1968-09-17
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Reeder Earl
- 👤 Sternbach Leo Henryk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/24; C07D243/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS FOR PRODUCING 5-PHENYL-3H-1,4-BENZODIAZEPIN-2(1H)-ONES WHICH COMPRISES REACTING A 2-(A-HALOLOWER ALKANOYL-AMIDO)-BENZOPHENONE WITH AMMONIA.
Claim 2
Dependent Claim
13 words
A PROCESS FOR PRODUCING 5-PHENYL-3H-1,4-BENZODIAZEPIN-2(1H)-ONES WHICH COMPRISES REACTING A 2-(A-HALOLOWER ALKANOYL-AMIDO)-BENZOPHENONE WITH AMMONIA.
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |