Pharmaceutical process
CA 2116956 C · Owner: Atkin, Graham J. · Inventors: Drew, Peter; Turner, John L.; Atkin, Graham J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of a pharmaceutical composition in the form of agglomerates comprising 70-97 % by weight of 2-(4-isobutylphenyl)propionic acid or a pharmaceutically acceptable salt thereof and 3-30 % by weight of a starch component said process comprising the steps of a) forming an emulsion comprising 1) 70- 97 % by weight of 2-(4-isobutylphenyl)propionic acid or a salt thereof; 2) a solvent system; 3) 3-30 % by weight of the starch component; 4) water and optionally 5) a surfactant; b) crystallising to produce a suspension comprising crystals of 2-(4isobutylphenyl)propionic acid or the salt thereof in intimate contact with the starch component; c) agitating said suspension …
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 August 25, 1992 and granted July 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 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.