Pyridyl- and pyrimidyl-piperazines in the treatment of substance abuse disorders
CA 2253473 A1 · Owner: Pharmacia Aktiebolag · Inventors: Bjork, Anders
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of a compound of formula (I) and the pharmaceutically acceptable acid addition salts thereof, wherein R1 is either halogen or hydrogen and R2 is halogen; X is CH2, O or S; R3 and R4 are the same or different and selected from hydrogen or lower alkyl; n is 2 or 3; A is selected from the pyrimidyl- or pyridyl- groups (a), (b) or (c) wherein R5 R6 and R7 are as defined in the , description; for the manufacture of a medicament for the relief or prevention of a withdrawal syndrome resulting from addiction to a drug or substance of abuse or for treatment thereof.
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 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2019.
- 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.