Salt stable cationic silicone oil-in-water microemulsion
CA 2266161 A1 · Owner: Smith, Janet Mary · Inventors: Gutierrez, Adriana Urrutia; Fecht, Cassandre Michelle; Kosal, Jeffrey Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition is disclosed that contains (A) a silicone component which is an aqueous oil-in-water microemulsion containing a polysiloxane stabilized in the microemulsion by a cationic surfactant and (B) an inorganic, salt or an organic salt. The polysiloxane in the cationic microemulsion has a particle diameter of less than 100 nanometer, preferably less than 40 nanometer. The polysiloxane is a polydimethylsiloxane or an amine functional polysiloxane, preferably prepared by emulsion polymerization. The composition preferably contains at least twenty percent by weight of the salt.
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 March 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2021.
- 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.