Sunscreen with disappearing color indicator
CA 2256126 C · Owner: Schering-Plough Healthcare Products, Inc. · Inventors: Morefield, Elaine M.; Ross, Jamie S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A colored, sunscreen emulsion is disclosed which employs a water-soluble dye or a blend of water-soluble dyes whose color substantially disappears when the sunscreen emulsion dries after it is spread on the skin and/or is rubbed out. The coloration in the sunscreen enables the user to more effectively protect against sunburn by allowing more complete and uniform coverage of the sunscreen on the skin. The sunscreen emulsion comprises: a) at least one watersoluble dye that imparts a color other than white to the sunscreen emulsion such that when the sunscreen emulsion dries after it is spread on the skin and/or is rubbed out, the color substantially disappears; b) at least one …
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 November 21, 1997 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2019.
- 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.