Substituted bicyclic derivatives for treating central nervous system disorders
CA 2270026 C · Owner: Pfizer Products Inc. · Inventors: Butler, Todd William; Fliri, Anton Franz Joseph
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 compounds of the formula and the pharmaceutically acceptable salts and solvates thereof wherein X1 X2, X3, R1, R2, R3 and R4 are as defined herein. The invention also relates to pharmaceutical, compositions containing the above compounds and to methods of treating shizophrenic and, shizo-affective disorders and related disorders which may be treated by administering, compounds having dopaminergic activity such as the above compounds of formula 1.
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 April 27, 1999 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2021.
- 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.