Treatment of solid-containing material derived from effluent
CA 2192540 C · Owner: Adams, John Michael · Inventors: Adams, John Michael; Phipps, Jonathan Stuart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for treating solid-containing material contained in or produced from waste paper or an effluent from a plant for treating paper or paper waste, the solid-containing material including organic material and inorganic particulate material, the method comprising subjecting the solidcontaining material to a heat treatment which incinerates the organic material present and forms a calcined product from the inorganic particulate material present and characterised in that the calcined product is formed into an aqueous suspension which includes a salt-forming cationic species and a reagent which contains or generates a salt-forming anionic species is added to the suspension to form an …
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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 11, 1996 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2018.
- 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.