Patent US3997531A successfully refreshed from Google Patents.
US3997531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,1,3-Benzothiadiazin-(4)-one-2,2-dioxides
Assignee: BASF SE
•
Filing: 1974-09-16
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Granted: 1976-12-14
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Expires: 1994-09-16
Abstract
Abstract New and valuable 2,1,3-benzothiadiazin-(4)-one-2,2-dioxides having a good herbicidal action and a process for controlling the growth of unwanted plants with these compounds.
Inventors
- 👤 Adolf Fischer
- 👤 Karl-Heinz Koenig
- 👤 Gerhard Hamprecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:14
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/15; C07D285/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A compound of the formula ##STR40## where R sec-butyl or cyclopropyl, or a salt thereof.
Claim 2
Dependent Claim
15 words
A compound of the formula ##STR40## where R sec-butyl or cyclopropyl, or a salt thereof.
Claim 3
Dependent Claim
1 words
3-sec-butyl-2,1,3-benzothiadiazin-(4)-one-2,2-dioxide.
Claim 4
Dependent Claim
1 words
3-sec-butyl-2,1,3-benzothiadiazin-(4)-one-2,2-dioxide.
References Cited (Backward Citations)
US3822257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |