Urea/lactate topical compositions for dry skin
CA 2104733 C · Owner: Thormahlen, Sven · Inventors: Schrader, Karlheinz; Thormahlen, Sven; Wenck, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and compositions for the treatment of dry skin involve the topical application to affected sites of a composition comprising from about 1% to about 12% by weight of urea and from about 1% to about 10% by weight of and alkali or an earth metal salt of lactic acid such as sodium, potassium or calcium lactate or a mixture of these salts in water-in-oil emulsions. In lotion embodiments the emulsion typically contains from about 1% to about 10% by weight, more narrowly from about 2% to about 5% by weight, lactate and from about 1% to about 10% by weight more narrowly from about 2% to about 5% by weight urea. In cream embodiments, the emulsion typically contains from about 1% to about 5% …
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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 August 24, 1993 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2015.
- 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.