Process for the preparation of dispersible colloidal systems of a substance in the form of nanocapsules
CA 1293170 C · Owner: Devissaguet, Jean-Philippe · Inventors: Devissaguet, Jean-Philippe; Puisieux, Francis; Fessi, Hatem
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of dispersible colloidal systems of a substance in the form of nanocapsules, ABSTRACT OF THE TECHNICAL CONTENT OF THE INVENTION The process according to the invention comprises: (1) the preparation of a liquid phase consisting essentially of a solution of a substance A in a solvent or in a mixture of solvents and containing, the substance B in solution or as a dispersion (2) the preparation of a second liquid phase consisting essentially of a non-solvent or a mixture of non-solvents for the substances A and B and, supplemented with one or more surfactants the solvent or mixture of, solvents of the first phase being miscible in all proportions with the nonsolvent …
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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.