Amino-substituted piperazine derivatives
CA 2074154 A1 · Owner: Ferrini, Pier G. · Inventors: Ferrini, Pier G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-18723/A, Amino-substituted piperazine derivatives Abstract, Amino-substituted piperazine derivatives of formula I wherein R1 - R6, X and Y are as defined in the description and salts thereof, have, properties inhibiting the biosynthesis of interleukin-1 (IL-I) as well as analgesic properties and can therefore be used as active ingredients in medicaments. They are prepared in a manner known per se.
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 July 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2014.
- 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.