Urea derivatives, and their production and use
CA 1136630 A · Owner: Sumitomo Chemical Company Limited · Inventors: Takahashi, Junya; Katoh, Haruhiko; Sumida, Seizo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a compound of the formula: wherein A is a hydrogen atom, a methyl group or a methoxy group, X is a straight or branched C1-C4 alkylene chain, Y is an oxygen atom or a sulfur atom R, which may, be same or different, is a lower alkyl group a lower, alkoxy group, a trifluoromethyl group a chlorine atom, a bromine atom or a fluorine atom m is an integer of 0, to 5 and n is an integer of 0 or 1 provided that in case, of R being a fluorine atom m is an integer of 0 to 5 and, in case of R being other than a fluorine atom m is an, integer of 0 to 3. These compounds show a pronounced herbicidal activity against a wide variety of weeds in the cultivation of crop plants …
Read the whole patent
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 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.