Shampoo compositions and suspending agent therefor
CA 2091872 C · Owner: Newell, Gerald P. · Inventors: Dowell, Teresa J.; Newell, Gerald P.; Zeffren, Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hair shampoo composition comprising a cleansing surfactant; a water-insoluble hair treating compound like, a hair conditioner or an antidandruff agent; a suspending agent comprising an amine including at least one long carbon chain and a suitable acid; and a suitable carrier and a method of treating hair are disclosed. The shampoo compositions effectively suspend the water-insoluble hairtreating compound, effectively cleanse the hair and effectively deliver the water-insoluble hair-treating compound to the hair or scalp.
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 17, 1993 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 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.