Tetrahydropyrimidines, their production and use
CA 2001497 A1 · Owner: Higuchi, Noriko · Inventors: Minamida, Isao; Okauchi, Tetsuo; Uneme, Hideki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tetrahydropyrimidines, their production and Use There is provided a pest control composition containing a compound represented by the formula, wherein R1 R2, R3 and R4 are the same or different and independently mean a hydrogen atom, a hydrocarbon group which may be substituted or a heterocyclic group which may be substituted and X means an electron attracting group or a salt thereof. The compound are least toxic to man domestic animals and, fish and selectively display remarkable control effect on 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 October 25, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2011.
- 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.