Organopolysiloxane and reticulated ammonium/acrylamide acrylate copolymer based aqueous dispersion for use in cosmetology in hair or skin treatment and/or in dermatology

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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 19, 1990 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2010.
• A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2012.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.