Patent US3660436A successfully refreshed from Google Patents.
US3660436A
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US
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Sulfamoylaryl ureas
Assignee: Hoechst AG
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Filing: 1970-06-09
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Granted: 1972-05-02
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Expires: 1990-06-09
Abstract
Abstract COMPOUNDS HAVING DESIRABLE SELECTIVE HERBICIDAL ACTIVITY ARE SUFAMOYL UREAS OF THE FORMULA 1-(R1-N(-R2)-SO2-),(R5)N,(R3-N(-R4)-CO-HN-)BENZENE IN WHICH R1 IS ALKYL OF 1 TO 4 CARBON ATOMS; R2 IS ALKYL OF 1 TO 4 CARBON ATOMS OR METHOXY; OR R1 AND 2 TOGETHER WITH THE NITROGEN ON WHICH THEY ARE SUBSTITUTED ARE PYRROLIDINO, PIPERADINO OR MORPHOLINO; R3 IS METHYL OR ETHYL; R4 IS METHYL, ETHYL OR METHOXY; R5 IS METHYL, CHLORO, BROMO OR DICHLORO-DIFLUORO-ETHOXY; AND N IS 0,1 OR 2, N BEING AT LEAST 1 WHEN R1, R2, R3 AND R4 ARE ALL METHYL.
Inventors
- 👤 Otto Scherer
- 👤 Gerhard Horlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:37
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; A; A01; A01N; A01N47/00; A01N47/08; A01N47/28; A01N47/30; C07C; C07C311/00; C07C311/30; C07C311/45; C07C311/47; C07C311/48
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |