Reversible stabilized emulsion and method for stabilizing and/or destabilizing an emulsion
CA 2465217 C · Owner: Institut Francais Du Petrole · Inventors: Henaut, Isabelle; Argillier, Jean-Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a stable emulsion of a non-miscible fluid and an aqueous phase with specific pH. The emulsion is optimized in that it comprises an ionic surfactant and a polyampholytic polymer whereof the charge is pH-dependent. The respective amounts of surfactant and polymers are determined on the basis of the charges. It is possible to adjust by pH control the stabilization or destabilization of the emulsion. The invention also concerns a method for stabilizing and destabilizing an emulsion comprising a surfactant combined with an ampholytic polymer.
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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 November 12, 2002 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2024.
- 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.