Cosmetics having photoprotection properties
CA 2062651 C · Owner: Max Factor K.K. · Inventors: Yoshioka, Takatsugu; Masuda, Hisatoshi; Tanaka, Hidekazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a useful cosmetic having high ultraviolet-screening effects (sunburn preventing effects), and excellent safety, and giving a natural makeup finish. This composition comprises a metal oxide flake having an average thickness of from 0.01 to 3 µm and an average size, of from 1 to 100 µm and a high polymer resin powder containing polymerization of a high polymer resin monomer uniformly mixed with an ultraviolet absorbent.
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 March 11, 1992 and granted May 27, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.
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.