Patent US1161056A successfully refreshed from Google Patents.
Patent US3732239A successfully refreshed from Google Patents.
US3732239A
Expired / Lapsed
US
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4-and 5-methyl-1h-benzotriazoles prepared from vicinal toluenediamine mixtures
Assignee: Honeywell International Inc
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Filing: 1971-11-05
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Granted: 1973-05-08
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Expires: 1991-11-05
Abstract
Abstract TOLUENEDIAMINE MIXTURES COMPRISING AT LEAST ABOUT 96% BY WEIGHT OF VICINAL TOLUENEDIAMINE ISOMERS AND NOT MORE THAN ABOUT 4% BY WEIGHT OF NON-VICINAL ISOMERS, SAID MIXTURES BEING ADAPTED FOR CONVERSION TO 4AND 5-METHYL-1$-BENZOTRIAZOLES IN HIGH YIELDS.
Inventors
- 👤 S Spatz
- 👤 M Bailey
- 👤 F Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033; C07; C07D; C07D249/00; C07D249/16; C07D249/18
Claims Analysis
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |