Drug particles obtained by freezing onto a cold surface
CA 2513006 A1 · Owner: Dow Global Technologies Inc. · Inventors: Hitt, James E.; Scherzer, Brian D.; Evans, Jonathan C.
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 method for preparing micron-sized or submicronsized drug particles comprising contacting a solution comprising a poorly water soluble drug substance and at least one freezable organic solvent with a cold surface so as to freeze the solution; and removing the organic solvent. The resulting particles are also disclosed as are several embodiments of an , apparatus that can be used in performing the method of the present invention.
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 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2025.
- 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.