US3644355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridazone derivatives
Assignee: Sandoz AG
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Filing: 1969-12-04
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Granted: 1972-02-22
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Expires: 1989-12-04
Abstract
Abstract COMPOUNDS OF FORMULA: 1-(3-F3C-PHENYL),4-(R1-N(-R2)-),5-X,6-(O=)-1,6-DIHYDRO PYRIDAZINE IN WHICH X SIGNIFIES CHLORINE OR BROMINE, R1 SIGNIFIES HYDROGEN OR METHYL AND R2 SIGNIFIES METHYL OR, WHEN R1 SIGNIFIES HYDROGEN, R2 MAY ALSO SIGNIFY ETHYL, ARE DISCLOSED AS POSSESSING SELECTIVE HERBICIDAL ACTIVITY IN COTTON AND CARROTS.
Inventors
- 👤 Cuno Ebner
- 👤 Max Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/22
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |