Herbicidal sulfonamides
CA 1204111 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Schwing, Gregory W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title, HERBICIDAL SULFONAMIDES, Abstract of the Disclosure This invention relates to a novel class of N-(heterocyclicaminocarbonyl)-o-alkoxymethylbenzene sulfonamide herbicides of formula, (I) wherein, L is S(O)nR7 or OR9;, 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; R7 is C1-C4 alkyl;, R8 is H, CH3 or OCH3; R9 is C1-C6 alkyl, C3-C4 alkenyl, CH2CF3 CF2CF2H or C5-C6 cycloalkyl;, n is O, 1 or 2; A is, , 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 …
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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 May 6, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 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
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.