Artificial tanning compositions containing positively charged paucilamellar vesicles
CA 2107076 C · Owner: Sottery, John P. · Inventors: Deckner, George E.; Sottery, John P.
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 oil-in-water emulsion compositions useful for imparting an artificial tan to human skin. These emulsions contain paucilamellar lipid vesicles i.e. vesicles comprising several concentric lipid bilayers encapsulating an, aqueous dihydroxyacetone solution. The vesicles comprise a polyoxyalkylene alkyl ether a sterol, a quafernary ammonium compound and optionally, a non-surface active oil. In further embodiments these emulsion compositions contain one or more sunscreens and are also useful for protecting human skin from the harmful effects of sunlight and other sources of ultraviolet radiation. The present invention also relates to methods for preparing these …
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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 April 3, 1992 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.