Patent US3697522A successfully refreshed from Google Patents.
US3697522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridazone derivatives
Assignee: BASF SE
•
Filing: 1969-02-03
•
Granted: 1972-10-10
•
Expires: 1989-02-03
Abstract
Abstract New and valuable pyridazone derivatives, especially mtrifluoromethylphenyl pyridazone derivatives, and a process for controlling unwanted plants with these compounds.
Inventors
- 👤 Franz Reicheneder
- 👤 Rudolf Kropp
- 👤 Adolf Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:23
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/04; A; A01; A01N; A01N43/00; A01N43/48; A01N43/58; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14; C07D237/16; C07D237/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
1 words
1-m-trifluoromethylphenyl-4-methoxy-5-bromopyridazone-(6).
Claim 2
Dependent Claim
1 words
1-m-trifluoromethylphenyl-4-amino-5-bromopyridazone-(6).
Claim 3
Dependent Claim
1 words
1-m-trifluoromethylphenyl-4-amino-5-chloropyridazone-(6).
References Cited (Backward Citations)
US3210353A
Cited
US3520886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |