Cosmetic composition comprising a hydrochalcone and optionally retinol or a derivative thereof
CA 2173444 C · Owner: Lee, Caroline Marian · Inventors: Prota, Giuseppe; Lee, Caroline Marian; Green, Martin Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for topical application to the skin in order to promote the repair of photo-damaged or aged skin and/or to reduce or prevent damaging effects of ultraviolet light on skin and/or to lighten the skin comprising a hydrocalchone of general structure (I) wherein, R1, R2 and R3, which may be the same or different represent H, -OH, -OR or -COR (where R is a C1-20 alkyl group); R4 R5, R6 and R7, which may be the same or different represent H or -COR (where R is as herein before defined). Optional additional ingredients include sunscreens and other skin lightening agents particularly retinol or derivatives thereof.
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 October 24, 1994 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2016.
- 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.