Method and unit for the treatment of water by ballasted flocculation and gravity separation with variable function modes
CA 2453498 C · Owner: Otv S.A. · Inventors: Ursel, Valery; Binot, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for treatment of water permitting the , physico-chemical treatment of water including a ballasted flocculation stage using a granular ballast material with a density greater than water followed , by, a stage of gravity separation of the treated water and the flocculent mass, a stage of separation of the granular material recycled for the , flocculation stage and the muds. Said muds are sent to a stage for treatment of the muds, characterised in comprising a stage in which the functional mode passes from a mode using ballasted flocculation and gravity separation using coagulation and flocculation reagents to a mode functioning by simple gravity …
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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 March 14, 2002 and granted August 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2024.
- 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.