Styling shampoo compositions with improved styling polymer deposition
CA 2269821 C · Owner: The Procter & Gamble Company · Inventors: Wells, Robert Lee; Inman, Everett Junior; Hill, Burt Landford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are hair styling shampoo compositions which comprise from about 5 % to about 50 % by weight of a surfactant selected from the group consisting of anionic surfactants, zwitterionic or amphoteric surfactants having an attached group that is anionic at the pH of the composition and combinations thereof; , from about 0.025 % to about 3 % by weight of an organic cationic polymer having a cationic charge density of from about 0.2 meq/gm to about 7 meq/gm and a molecular weight of from about 5,000 to about 10 million; from about 0.1 % to about 10 % by weight of a water-insoluble hair styling polymer; from about 0.1 % to about 10 % by weight of a water-insoluble volatile solvent; …
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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 October 8, 1997 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 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.