Method for encapsulating fine solid particles in the form of microcapsules
CA 2416004 A1 · Owner: Perrut, Michel · Inventors: Perrut, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for encapsulating fine solid particles in the form of microcapsules. Said method is characterised in that it comprises steps which consist in forming a suspension of said particles in a liquid consisting of at least a coating agent in intimate contact with a fluid having a pressure lower than its critical pressure so as to saturate said suspension, spraying said fluid-saturated suspension through expansion means and collecting the microcapsules in the gas stream resulting from decompression.
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 July 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.