Benzoylurea derivative and its production and use
CA 1293516 C · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Fujimoto, Izumi; Sakamoto, Noriyasu; Ohsumi, Tadashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A benzoylurea derivative which is useful as an insecticidal and acaricidal composition and represented by the formula, wherein R1 is a fluorine or hydrogen atom R2 is a, chlorine or hydrogen atom, R3 is a fluorine or bromine atom or a lower haloalkyl group, and X and Y which may, be the same or different, are an oxygen or sulfur atom.
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 December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.