Diaminoethylene compounds
CA 2014490 C · Owner: Minamida, Isao · 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
Diaminoethylene derivatives of the formula: (see formula I), wherein R1 is a heterocyclic group which may be substituted, R2, R3 and R4 are a hydrogen atom or a hydrocarbon group which may be substituted or R3 and R4 are combined to form a cyclic amino group together with the adjacent nitrogen atom; R5 is hydrogen atom or a hydrocarbon group or heterocyclic group which may be substituted, X is an electron attractive group; Y is a hydroxyl or substituted hydroxyl group amino or, substituted amino group or mercapto or substituted mercapto group; n is d or 1; or their salts which are, useful as insecticides.
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, 1990 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.
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.