Pyrrolopyrazolopyrimidine compound and medicine comprising the same as active ingredient
CA 2228360 A1 · Owner: Hiyama, Naoki · Inventors: Yuasa, Masayuki; Harada, Mariko; Namiki, Takayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compounds represented by the following general formula (1):, wherein R1 represents an alkyl group R2 represents an, amino group, alkyl group or the like and R3 represents a, nitro group, amino group heterocyclic group, alkylsulfonylamino group or the like or salts thereof, medicines comprising such a compound a preparation process, of the compounds and intermediates useful for preparation thereof. The compounds (1) are useful for the prevention and treatment of a respiratory disease.
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 January 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2020.
- 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.