Thickened alkali metal hypochlorite compositions
CA 2179409 C · Owner: Reckitt & Colman Inc. · Inventors: Chang, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the invention, a thickened alkali metal hypochlorite composition exhibiting a high level of stability has been discovered. An alkali metal C10-C14 straight chain alkyl benzene sulfonate used in conjunction with a molar ratio of tertiary amine oxide to the sulfonate ranging from about 5:1 to about 11:1 has been discovered to increase the viscosity of alkali metal hypochlorite bleaches.
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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 21, 1994 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 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
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.