Herbicidal o-sulfamylmethylbenzenesulfonamides
CA 1203535 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Sauers, Richard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HERBICIDAL o-SULFAMYLMETHYLBENZENESULFONAMIDES Abstract of the Disclosure, Compounds, of the formula wherein, L is SO2NR3R4;, R is H, F, Cl Br, NO2, CF3, C1-C3 alkyl or C1-C3 alkoxy; R1 is H or C1-C4 alkyl;, R2 is H or CH3; R3 is C1-C4 alkyl or OCH3;, R4 is C1-C4 alkyl; R8 is H, CH3 or OCH3;, A is, <IMAGE<, or W is O or S;, X is H, Cl, Br, CH3, CH2CH3 C1-C3 alkoxy, CF3, SCH3 or, CH2OCH3;, Y is CH3 or OCH3; Z is N, CH, CCl, CBr, CCN, CCH3, CCH2CH3 CCH2CH2Cl or, CCH2CH=CH2;, y1 is H, CH3 OCH3 or OCH2CH3;, and, Q is O or CH2;, and their agriculturally suitable salts; provided that:, (1) when R3 is OCH3, then R4 is CH3; (2) the total number of carbon atoms of R3 and R4 is five or less; and, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.