Triazolopurine derivatives, pharmaceutical compositions containing the derivatives, and adenosine a3 receptor affinitive agents
CA 2385865 A1 · Owner: Otsuka Pharmaceutical Factory, Inc. · Inventors: Kurogi, Yasuhisa; Nishikawa, Hiroshi; Okamura, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Triazolopurine derivatives represented by general formula (1) exhibit affinity for adenosine A3 receptor and are therefore useful as the ingredient of drug compositions wherein R1 and R2 are each as defined in the description.
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 22, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2022.
- 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.