Antiperspirants containing aerogel particles
CA 2175814 C · Owner: Moses, John M. · Inventors: Klotz, Irving M.; Moses, John M.; Cao, Wanqing
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for providing aerogels, and aerogels produced according to the method is described. As one aspect, antiperspirant compounds that are aerogel form, and antiperspirant and deodorant compositions including such salts are described. The method, involves contacting a solution containing material to be processed with a species selected to precipitate the material and selected so as to be miscible with the solvent system of the solution. After the material is precipitated the material may be washed with the precipitating species until it is substantially free of solvent system. Then the precipitating species containing the material precipitate is taken above its critical point, and the …
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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 November 7, 1994 and granted January 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2016.
- 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.