New purine derivatives, the preparation thereof and their use as pharmaceutical compositions
CA 2496211 A1 · Owner: Mark, Michael · Inventors: Mark, Michael; Himmelsbach, Frank; Maier, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel purine derivatives of general formula (I) in , which R1 to R4 are as defined in the claims the tautomers, stereoisomers, mixtures prodrugs and salts thereof, in particular the physiologicallyacceptable salts thereof with inorganic acids or bases which have useful pharmacological properties, in particular an inhibitory effect on the activity of the dipeptidylpeptidase-IV (DPP-IV) enzyme the production and use thereof , for the prevention or treatment of diseases or conditions related to an increased DPP-IV activity or which can be prevented or reduced by a reduction in the DPP-IV activity, in particular diabetes mellitus of type I or type II. The invention …
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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 August 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2025.
- 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.