Imidazopyrimidine derivatives and triazolopyrimidine derivatives
CA 2407531 A1 · Owner: Yura, Takeshi · Inventors: Marumo, Makiko; Komura, Hiroshi; Redmann, Aniko M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula (I) wherein R1 is -X-R4 an optionally substituted , heterocyclic residue an optionally substituted carbocyclic residue or optionally substituted condensed ring moiety; X is CR5R6 O, S, SO, SO2 or , NR7; Y is CH or N; R2 is H an optionally substituted C1-C10 alkyl,etc.; R3 is an optionally substituted aryl, or an optionally substituted heteroaryl etc.; , R4 is an optionally substituted aryl an optionally substituted heteroaryl, etc.; R5 R6, and R7 can be identical or different and represent H an , optionally substituted C1-C10 alkyl etc. The compound has an excellent antiallergic activity and the like.
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 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2023.
- 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.