N,n-disubstituted phthalamic acids and their ammonium salts, and their uses thereof as surfactants, emulsifiers, and conditioning agents in shampoos
CA 2019704 C · Owner: Stepan Company · Inventors: Bernhardt, Randal J.; Sajic, Branko; Goze, Jean M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention encompasses formulated conditioning shampoos surfactant solutions and emulsifier solutions comprising effective amounts of salts of the following general formula (see formula I), wherein, R1, R2, R3, and R4 are the same or different and represent straight or branched chain alkyl groups having 10 to 40 carbon atoms, or aryl straight or branched chain alkyl groups having 10 to 40 carbon atoms. The invention also encompasses formulated conditioning shampoos, surfactant solutions, and emulsifier solutions comprising effective amounts of mixtures of a salt of formula I and an acid of formula II, (see fig II), wherein, R1 and R2 are the same or different and represent straight or …
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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 June 28, 1990 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2012.
- 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
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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.