US3419545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing 7-halo-2-dimethylamino - 5-phenyl-3h-1,4-benzodiazepine 4-oxides
Assignee: Warner Lambert Co LLC
•
Filing: 1961-05-29
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Granted: 1968-12-31
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Sheldon Farber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:01
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A METHOD OF PREPARING 7-HALO-2-DIMETHYLAMINO-5PHENYL-3H-1,4-BENZODIAZEPINE 4-OXIDE WHICH COMPRISES TREATING A SOLUTION OF 6-CHLORO-2-CHLOROMETHYL-4-PHENYLAZOLINE 3-OXIDE IN AN INERT SOLVENT WITH DIMETHYLAMINE AT A TEMPERATURE BETWEEN -10*C. AND -50*C.
Claim 2
Independent Claim
27 words
A METHOD OF PREPARING 7-HALO-2-DIMETHYLAMINO-5PHENYL-3H-1,4-BENZODIAZEPINE 4-OXIDE WHICH COMPRISES TREATING A SOLUTION OF 6-CHLORO-2-CHLOROMETHYL-4-PHENYLAZOLINE 3-OXIDE IN AN INERT SOLVENT WITH DIMETHYLAMINE AT A TEMPERATURE BETWEEN -10*C. AND -50*C.
References Cited (Backward Citations)
US2893992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |