Thickened compositions
CA 2172721 A1 · Owner: Solvay Interox Limited · Inventors: Gray, Andrew Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Neutral or alkaline thickened aqueous hydrogen peroxide compositions and processes for the production thereof are provided. The compositions are thickened with a polymeric thickener comprising a polyethylene backbone pendant carboxyl groups and pendant groups of the formula - (OCH2CH2)m(OCHXCHY)n-O-R, where m is a positive integer n is zero or a , positive integer, X and Y are independently selected from hydrogen atoms methyl and ethyl groups and R is a hydrophobic group comprising 8 or more carbon atoms; and one or more surfactants selected from the group consisting of alcohol ethoxylates, alkylbenzenesulphonates comprising 10 or more carbon atoms, alkylsulphates comprising 6 or more …
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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 September 23, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.