1,2-dihydropyridine compounds, manufacturing method thereof and use thereof
CA 2412172 C · Owner: Amino, Hiroyuki · Inventors: Ito, Koichi; Ogo, Makoto; Ueno, Masataka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a novel compound having an excellent AMPA receptor inhibitory action and/or kainate inhibitory action. A compound represented by the following formula, a salt thereof or hydrates thereof. (see formula I) In the formula, Q indicates NH, O or S; and R1 R2, R3, R4 and R5 are the same as or different from each other and each indicates hydrogen atom, a halogen atom a C1-6 alkyl group or , a group represented by the formula -X-A (wherein X indicates a single bond, an optionally sbutituted C1-6 alkylene group etc.; and A indicates an optionally substituted C6-14 aromatic hydrocarbocyclic group or 5- to 14-membered aromatic heterocyclic group etc.).
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 June 8, 2001 and granted July 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 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.