Use of amphiphilic copolymers to stabilize dispersions of insoluble organic compounds that filter uv radiation, dispersions stabilized by these copolymers and cosmetic compounds containing said copolymers

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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 September 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2022.
• A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2024.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.