Piperidones
CA 2273446 C · Owner: Fox, David Nathan Abraham · Inventors: Mathias, John Paul; Tommasini, Ivan; Fox, David Nathan Abraham
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 a compound of the formula: or a pharmaceutically acceptable acid addition salt or solvate thereof wherein R is C3-C7 cycloalkyl, (C3-C7 cycloalkyl)C1-C4 alkylene or benzyl; R1 is phenyl optionally substituted by 1 or 2 substituents each independently selected from fluoro and chloro; X is O or NSO2R2; and, R2 is C1-C4 alkyl or halo(C1-C4)alkyl together with processes for, the preparation of intermediates used in the preparation of compositions containing and uses of, such compounds having tachykinin antagonist activity.
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 2, 1999 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 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.