Use of partly pre-hydrated lime for separating a mixture of solid/liquid matters, method for treating sludge and purified sludge obtained by said method
CA 2579862 C · Owner: Gombart, Marc · Inventors: Gombart, Marc; Bartiaux, Stephane; Tilquin, Jean-Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a novel use of partly pre-hydrated lime with delayed reactivity consisting of 40 to 98 wt. % of CaO and 60 to 2 wt. % of Ca(OH)2 preferably 80 to 92 wt. % of CaO and 20 to 8 wt. % of Ca(OH)2 and more preferably 85 to 90 wt. % of CaO and 15 to 10 wt. % of Ca(OH)2 for separating solid matters from liquid in a suspension. The invention also concerns a method for treating sludge which consists in concentrating, drying and collecting the solid matters using said partly pre-hydrated lime with delayed reactivity. The invention further concerns the purified sludge obtained by said method as novel industrial product.
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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 6, 2005 and granted February 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.