Condensed pyrimidine derivative
CA 2076431 A1 · Owner: Kitoh, Kyosuke · Inventors: Nomura, Hiroaki; Kotake, Yoshihiko; Ueda, Norihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel pyrimidine derivatives and pharmacologically acceptable salts thereof are disclosed which exhibit excellent antitumor activity and are, represented by the following general formula: (I), wherein R1 represents a hydroxyl or amino group; R2 represents a phenylene, pyridinediyl, thiendiyl furandiyl, or thiazoldiyl group, -CO2R5 and -CO2R6 may be the same or different from each other and each represents a carboxyl group or a carboxylic acid ester, the part X-Y-Z represents , , or , A, represents an oxygen atom a group represented by the, formula: , (wherein R3 and R4 may be the same or different from each other and each represents a hydrogen or halogen atom or a hydro-carbon group which …
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 August 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.