Hair coloring compositions
CA 2274948 A1 · Owner: The Procter & Gamble Company · Inventors: Dunbar, James Charles; Pratt, Dominic; Dias, Louis Carlos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hair coloring composition present in a single package suitable for direct application to the hair wherein the hair coloring mixture comprises: a) an oxidising agent; and b) an oxidative hair coloring agent; and wherein the combined mixture of a) and b) has a pH in the range of from about 1 to about 5 and wherein the resultant color delivered to the hair (Delta E) after at , least about 1 month of storage at room temperature is up to about 75 %, preferably up to about 85 % more preferably up to about 90 % and most preferably up to about 95 % of the total color delivered to the hair (Delta E) from a mixture of a) and b) on application. The products are storage stable re-usable and can …
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 December 9, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 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.