Hair styling shampoos
CA 2079680 C · Owner: Snyder, Michael Albert · Inventors: Wells, Robert Lee; Frey, Donald Hugh; King, Bonnie Theresa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to hair shampoo compositions comprising from about 5 % to about 30% of a surfactant from, about 0.2 % to about 20 % of certain hair styling polymers and from about 0.2 % to about 20 % of a solvent for said hair styling polymer. These compositions provide hair cleaning and styling benefits from a single product. Preferred compositions of the present invention additionally comprise from about 0.1% to about 10 % of a silicone hair conditioning agent. These compositions provide hair conditioning, cleaning and styling benefits from a single product. The polymers which provide styling benefits are characterized by a Tg of greater than -20 °C and a solubility …
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 April 1, 1991 and granted February 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2013.
- 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.