Patent US3344136A successfully refreshed from Google Patents.
US3344136A
Expired / Lapsed
US
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Process for producing 3-acetamido-1, 3-dihydro-5-phenyl-2h-1, 4-benzodiazepin-2-ones
Assignee: Wyeth LLC
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Filing: 1964-11-30
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Granted: 1967-09-26
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Expires: 1984-11-30
Abstract
No abstract record available.
Inventors
- 👤 Stanley C Bell
- 👤 Scott J Childress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:57
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
36 words
THE PROCESS FOR PREPARING 3-ACETAMIDO-1,3-DIHYDRO5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE COMPRISING: HEATING A COMPOSITION OF MATTER IN WHICH THE BENZOPHENONE NUCLEUS HAS ATTACHED THERETO THE 2-(N-ACETOXYACETAMIDO) ACETAMIDO RADICAL IN THE 2-POSITION WITH AMMONIA IN A NON-REACTIVE POLAR SOLVENT TO PRODUCE 3-ACETAMIDO-1,3-DIHYDRO-5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE.
Claim 2
Dependent Claim
36 words
THE PROCESS FOR PREPARING 3-ACETAMIDO-1,3-DIHYDRO5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE COMPRISING: HEATING A COMPOSITION OF MATTER IN WHICH THE BENZOPHENONE NUCLEUS HAS ATTACHED THERETO THE 2-(N-ACETOXYACETAMIDO) ACETAMIDO RADICAL IN THE 2-POSITION WITH AMMONIA IN A NON-REACTIVE POLAR SOLVENT TO PRODUCE 3-ACETAMIDO-1,3-DIHYDRO-5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |