Suspensions with high storage stability, comprising an aqueous silicate solution and a filler material
CA 2286005 A1 · Owner: Howarth, Ian Maurice · Inventors: Osinga, Theo Jan; Howarth, Ian Maurice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Suspension, having a high storage stability comprising an aqueous silicate , solution and a filler material wherein the silicate solution has a silicate content of at least 20 % by weight, the filler material has an average particle size of 0.8-15 µm and a specific weight of below 2.75 kg/l the , filler being chosen from the group consisting of: a) zeolites; b) fine particulate or fibrous amorphous inorganic material being relatively inert in an alkaline aqueous solution, comprising amorphous alkali metal alumino silicate; c) fine particulate of graphite or carbon black; or d) mixtures thereof, said suspension having a high storage stability in the absence of a stabilizer.
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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 April 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2020.
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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.