Imide derivatives as therapeutic agents for senile dementia
CA 2531980 C · Owner: Ishiyama, Takeo · Inventors: Ishiyama, Takeo; Ohno, Yukihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula 1: (see formula 1), wherein Z is a group of the formula 2: (see formula 2), D is a group of -(CH2)p-A-(CH2)q-; G is =N- -CH-, etc.; arid Ar is an , 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 22, 2004 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 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
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.