Pyrazolo 4, 3-dpyrimidines, process for their preparation and methods of use
CA 2524344 C · Owner: Lenobel, Rene · Inventors: Uldrijan, Stjepan; Krystof, Vladimir; Binarova, Pavla
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to 3-, 7-disubstituted pyrazolo4,3-dpyrimidines represented by the general formula I (I) and pharmaceutically acceptable , salts thereof wherein R3 is selected from the group consisting of alkyl cycloalkyl, cycloalkyl alkyl, cycloheteroalkyl alkyl cycloheteroalkyl, aryl, heterocycle, heteroaryl arylalkyl, heteroarylalkyl, and heteroalkyl wherein each of the groups may optionally be substituted R7 is selected from , the group consisting of halogen hydroxyl, hydroxylamino, amino, carboxyl cyano, nitro, amido, sulfo, sulfamido, carbamino unsubstituted or substituted , alkyl, substituted or unsubstituted cycloalkyl substituted or unsubstituted , arylalkyl substituted or …
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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 May 6, 2004 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2026.
- 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
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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.