Soil-cement compositions and methods
CA 2096692 A1 · Owner: Riley, Wendell D. · Inventors: Riley, Wendell D.; Lindstrom, Kurt O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides improved soil-cement compositions and methods of forming subterranean cementitious masses using the compositions. The soil-cement compositions are basically comprised of hydraulic cement water present in, the compositions in amounts sufficient to form slurries of the solids therein, a dispersant comprised of a mixture of sodium dihydrogen phosphate buffer, ferrous lignosulfonate ferrous, sulfate and tannic acid and soil present in an amount whereby the volume ratio of cement, water and dispersant to soil in the compositions is in the range of from about 0.3:1 to about 2.1:1.
Read the whole patent
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 May 20, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2015.
- 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.