Shampoo compositions and method
CA 2261755 C · Owner: Dechsinga, Siriporn · Inventors: Murray, Andrew Malcolm; Birtwistle, David Howard; Dechsinga, Siriporn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous conditioning shampoo composition comprising in addition to water: , i) at least one surfactant chosen from anionic nonionic, zwitterionic or amphoteric surfactants or mixtures thereof; ii) emulsified particles of an insoluble, nonvolatile silicone; iii) a soluble cationic hair conditioning polymer having a cationic charge density of about +3.0 meq/gram or less, in which the emulsified particles of insoluble, nonvolatile silicone are incorporated into the shampoo composition as a preformed aqueous emulsion having an average silicone panicle size in the emulsion and in the shampoo composition of from 2 to 30 microns.
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 9, 1997 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 2019.
- 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.