Ureas
CA 1313666 C · Owner: Ciba-Geigy Ag · Inventors: Rempfler, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
5-16980/=, Novel Ureas, Abstract, The present invention relates to novel N-(2-nitrophenyl)-N-pyrimidin-2-ylureas having a herbicidal and plant growth-regulating activity to, agrochemical compositions containing those substances as active ingredients, to the use of the novel ureas for controlling weeds or for regulating plant growth, and to processes for the preparation of the novel compounds. The invention also relates to novel intermediates and to processes for the preparation thereof. The novel compounds correspond to formula I (I), in which, R1 is hydrogen, methyl, fluorine chlorine or bromine, R2 is C1-C2haloalkyl having at least 2 fluorine atoms and, R3 is C1-C4alkyl, with the proviso …
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 February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 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.