2,7-substituted octahydro-1h-pyrido1,2-apyrazine derivatives
CA 2200959 C · Owner: Pfizer Inc. · Inventors: Sanner, Mark A.; Desai, Kishor A.; Fliri, Anton F. J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted pyrido1,2-apyrazines of general formula (I) wherein Ar and Ar1 represent various carbocyclic and heterocyclic aromatic rings; A represents O S, SO, SO2, C=O, CHOH, or -(CR3R4) and n is 0-2 as well as precursors thereto are ligands for dopamine receptor subtypes within the body and are therefore useful in the treatment of disorders of the dopamine system.
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 August 24, 1995 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2017.
- 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.