Patent US3933843A successfully refreshed from Google Patents.
US3933843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 1-substituted-4-oxo-3-substituted phenyl-1,2,3-triazolium compounds
Assignee: Pfizer Inc
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Filing: 1974-12-13
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Granted: 1976-01-20
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Expires: 1994-12-13
Abstract
Abstract A process for inhibiting plant growth comprising contacting a plant or its growth area with an effective amount of certain para-halophenyl substituted triazolines. A series of novel mesoionic para-halophenyl substituted triazolines. A novel process for preparing 3-phenyl-4-oxo-1,2,3-triazoline by contacting benzenediazoniumchloride and an alpha -amino carboxylic acid and cyclodehydrating the triazene produced using acetic anhydride and pyridine.
Inventors
- 👤 Marwan J. Abu-El-Haj
- 👤 James W. McFarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:13
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/02; C07D249/04; C07D249/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
4-oxo-1-t-butyl-3(2,4-dichlorophenyl)-1,2,3-triazole.
Claim 2
Dependent Claim
1 words
4-oxo-1-t-butyl-3(2,4-dichlorophenyl)-1,2,3-triazole.
Claim 3
Dependent Claim
36 words
A compound of the formula ##SPC7## wherein R 1 is halogen; R 3 and R 4 are each hydrogen or halogen; and R 5 is alkyl of 2-5 carbon atoms or cycloalkyl of 5-6 carbon atoms.
Claim 4
Dependent Claim
36 words
A compound of the formula ##SPC7## wherein R 1 is halogen; R 3 and R 4 are each hydrogen or halogen; and R 5 is alkyl of 2-5 carbon atoms or cycloalkyl of 5-6 carbon atoms.
References Cited (Backward Citations)
US2705713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |