N-phenylpyrazole derivatives as insecticides
CA 2024955 A1 · Owner: Roberts, David Alan · Inventors: Roberts, David Alan; Buntain, Ian George; Hawkins, David William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An N-phenylpyrazole derivative of the general formula : (I), Wherein A represents an halogen atom chosen among iodine, bromine, the hydrogen atom or an amino group. m is the integer 1 or 2 n is zero or the integer 1 or 2, with the exclusion of the compounds wherein A represents the amino group and n is zero. Those compounds are useful for controlling arthopod plant nematode, helminth or protozoal pests.
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
- Filed September 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.