Finely divided solid crystalline powders via precipitation into an anti-solvent
CA 1338106 C · Owner: Pharmacia & Upjohn Company · Inventors: Schmitt, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a process for producing a finely divided solid which comprises (1) dissolving the solid to be finely divided in a liquid carrier solvent to form an injection solution and (2) adding the injection solution of step (1) to a volume of antisolvent sufficient to precipitate or crystallize the solid. The solid can be a pharmaceutical agricultural chemical, commercial chemical fine chemical, food item, photographic chemical, dye, paint, polymer or cosmetic.
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
- Granted March 5, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2013.
- 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.