Imine compounds and their production
CA 2078697 C · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Funaki, Yuji; Matsumoto, Mitsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an imine compound of the general formula:, wherein R1 and R2 are the same or different and each represent a C1-C5 alkyl group, or R1 and R2 are combined together to form a C4-C5 alkylene group; R3 is a C1-C5 alkyl group a, alkenyl group or a C3-C4 alkynyl group. The imine compound of the present invention is useful as an intermediate in the production of agrochemicals and the like. The invention is also directed to an amide compound useful as a raw material for preparation of the imine compound and to production processes for these compounds.
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 21, 1992 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2014.
- 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.