New substituted imidazo-pyridinones and imidazo-pyridazinones, the preparation thereof and their use as pharmaceutical compositions
CA 2508233 C · Owner: Mark, Michael · Inventors: Mark, Michael; Kauffmann-Hefner, Iris; Tadayyon, Mohammad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to substituted imidazo-pyridinones and imidazo-pyridazinones , of general formula, (see formula I) wherein R1 to R4 are defined as in claim 1 the tautomers, the stereoisomers, the mixtures thereof and the salts thereof which have valuable , pharmacological properties particularly an inhibitory effect on the activity of , the enzyme dipeptidylpeptidase-IV (DPP-IV).
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 December 3, 2003 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.