Hair care composition and methods of treating hair
CA 2036444 C · Owner: Dow Corning Corporation · Inventors: Lamb, Jo A.; Dillon, Kathy L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hair care compositions containing a hydrophobic cationic emulsion of a highly branched and crosslinked silicone polymer. The silicone polymer is a polydimethylsiloxane and the silicone emulsions can be formulated into conditioners, styling gels, pump sprays and permanent hair waving products. The compositions are effective in enhancing wet and dry combing and feel of hair.
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 February 15, 1991 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.