Novel crystals of 1,3,4-oxadiazole derivative, process for producing the same and pharmaceutical agent containing the same as active ingredient
CA 2421499 A1 · Owner: Kojima, Tsutomu · Inventors: Kojima, Tsutomu; Ohmoto, Kazuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Form 2 crystals of 2-5-amino-6-oxo-2-phenyl-1,6-dihydro-1-pyrimidyl-N-1-(2- 5-t-butyl-1,3,4-oxadiazolylcarbonyl)-2-R,S)-methylpropylacetamide (I); a process for producing the crystals; and medicines containing the same as the active ingredient.
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 7, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2023.
- 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.