Insecticidal compositions
CA 2040370 C · Owner: Dohara, Kazunobu · Inventors: Abe, Yasuo; Dohara, Kazunobu; Makita, Mitsuyasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The insecticidal composition of the present invention contains (a) 2,4-dioxo-1-(2-propynyl)imidazolidin-3-ylmethyl chrysanthemate and (b) at least one carboxylic acid ester selected from the group consisting of monocarboxylic acid ester having 16 to 19 carbon atoms and dicarboxylic acid ester having 16 to 19 carbon atoms, the weight ratio of (a) to (b) being from 3:1 to 1:100.
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 April 12, 1991 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2013.
- 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.