US3557088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenyl 1,2-diazepines
Assignee: Wyeth Holdings LLC
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Filing: 1968-09-25
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Granted: 1971-01-19
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Expires: 1988-09-25
Abstract
Abstract 1,2-DIAZEPINES WHICH HAVE A PHENYL GROUP IN THE 3,5, AND 7 POSITIONS AND OPTIONALLY METHYL OR PHENYL IN THE 1-POSITION ARE PREPARED FROM A 2,4,6-TRIPHENYLTHIAPYRYLIUM SALT SUCH AS THE PERCHLORATE OR FLUOBORATE, BY REACTION WITH AN EXCESS OF HYDRAZINE, METHYLHYDRAZINE OR PHENYLHYDRAZINE, THE EXCESS OF HYDRAZINE SERVING AS SOLVENT. BY THIS METHOD THERE ARE PREPARED 2,5,7-TRIPHENYLAND 5-(P-DIMETHYLAMINOPHENYL)-3,7-DIPHENYL-4H1,2-DIAZEPINES AND 1-METHYL-3,5,7-TRIPHENYL-1H1,2-DIAZEPINE. ALL THE COMPOUNDS WHEN PROTONATED ARE USEFUL IN DYEING FIBERS HAVING ANIONIC SITES. THE 1H COMPOUNDS EXHIBIT BACTERICIDAL ACTIVITY AND THE 4H COMPOUNDS EXHIBIT VASODEPRESSOR ACTIVITY.
Inventors
- 👤 Erwin Klingsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/02
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |