Preventives or remedies for alzheimer's disease or amyloid protein fibril-formation inhibitors, which include a nitrogen-containing heteroaryl compound
CA 2468948 C · Owner: Btg International Ltd. · Inventors: Oda, Tomiichiro; Koyama, Kazuo; Kaneko, Isao
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 preventives or remedies for Alzheimer's disease, or to amyloid protein fibril--formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: , (see formula I) (where, R1 and R2 are H or alkyl; Z1 and Z2 are H alkyl, alkoxy, haloalkyl or halogeno; Z3 is alkoxy SH, alkylthio, NH2, mono- or di-alkylamino OH or halogeno; …
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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 November 25, 2002 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2024.
- 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
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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.