5-chloro-3-(4-methanesulfonylphenyl)-6'-methyl-2,3'bipyridinyl in pure crystalline form and process for synthesis
CA 2447878 C · Owner: Davies, Ian W. · Inventors: Osifchin, Richard G.; Crocker, Louis S.; Davies, Ian W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention encompasses a pharmaceutical composition comprising the compound of formula A: A in combination with a pharmaceutically acceptable carrier, said compound being comprised of about 1-50% 1-20% or 1-10% of the , polymorphic form which is designated Form V and the remainder of the compound being comprised of at least one polymorphic form selected from the group consisting of: Form I, Form II, Form III and Form IV
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 September 21, 2001 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2023.
- 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.