Method for settling of suspensions with use of seepage force and vibrations
CA 2228072 C · Owner: Ter-Stepanian, Anahit · Inventors: Ter-Stepanian, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Impossibility to settle mining tailings in form of hard sediments and forced storage of jelly-like sludge in tailings ponds have a great economic and environmental impact. This feature is caused by undiscovered until present suspension force that decreases the static unit weight of solid particles. Lesser dynamic unit weight is fanned and solid particles settle extremely slowly. On sufficient concentration of suspension the solid particles become weightless and further settling is ceased. The solid particles remain in equilibrium for indefinite long time. This force can be destroyed by greater seepage force and dense sediment can be obtained. A number of auxiliary methods can be used as …
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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 6, 1998 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2020.
- 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.