Piperazine derivative
CA 2470808 A1 · Owner: Nozawa, Dai · Inventors: Nakazato, Atsuro; Ishii, Takaaki; Nozawa, Dai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A piperazine derivative represented by the formula (1) wherein n is an integer of 1 to 8; R1 represents hydrogen or C1-10 alkyl; A represents CH or nitrogen; Ar1 represents phenyl or substituted phenyl; and Y represents a group represented by the formula Y1-Y2-Ar2 or Y3-Y4(Ar5)-Ar6 or a pharmaceutically acceptable salt of the derivative. The novel piperazine derivative has MC4 receptor antagonistic 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 December 19, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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
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.