Urea derivatives, processes for production thereof and herbicide
CA 1324148 C · Owner: Takematsu, Tetsuo · Inventors: Takahashi, Katsuya; Hashimoto, Isao; Fukuoka, Daisuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel compounds of formula I, a process for their production and their, use as a herbicide:, ..... I wherein, A represents the bond -N= or -?= in which X is a hydrogen atom, a chlorine atom, a nitro group or a trifluoromethyl group;, B represents a hydrogen atom a methyl group or, a methoxy group; and Ar represents one member selected from the group consisting of, , , , , , , , , , and , in which R1 to R38 independently from each other, represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; R16 may further represent a hydroxyl group; a pair of R2 and R3 a, pair of R6 and R7 and a pair of R9 and R10 each taken together, may represent an alkylene …
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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 November 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 9, 2010.
- 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
Timeline From CIPO dates
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.