Arylpiperidine derivatives
CA 2004249 C · Owner: Pfizer Limited · Inventors: Nagel, Arthur Adam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A series of novel N-alkyl or oxyalkyl arylpiperidine derivatives have been prepared, including their pharmaceutically acceptable acid addition salts, wherein the N-alkyl side chain is further substituted by certain heterocyclic ring groups. These particular compounds are useful in therapy as neuroleptic agents for the control of various psychotic disorders and are represented by the formula:, wherein Ar is methoxyphenyl or naphthyl; n is an integer of from two to four, inclusive; X is a direct link; and, R is 2-amino-4-thiazolylphenyl 5-oxindolyl, 2-methyl-4-, oxo-4H-pyrido1,2-apyrimidin-3-yl or 1,8,8-trimethyl-2,4-dioxo-3azabicyclo-3.2.1octan-3-yl. Methods for preparing all these compounds …
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 November 30, 1989 and granted September 17, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2011.
- 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.