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US4002636A
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US
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Certain novel substituted tetrahydro-oxothiazolo-triazolium compounds useful as herbicides
Assignee: Pfizer Inc
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Filing: 1974-12-13
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Granted: 1977-01-11
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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 certain novel substituted tetrahydro-oxothiazolo-triazolium compounds useful as herbicides. 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
2026-11-08 06:37
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D249/00; C07D249/02; C07D249/04; C07D249/06; C07D513/00; C07D513/02; C07D513/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A compound of the formula ##STR8## wherein R 1 is halogen; and R 3 and R 4 are each hydrogen or halogen.
Claim 2
Dependent Claim
22 words
A compound of the formula ##STR8## wherein R 1 is halogen; and R 3 and R 4 are each hydrogen or halogen.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |