Method for the combustion of waste liquids
CA 2117064 C · Owner: Trusler, Winston · Inventors: Svensk, Lennart; Van Rensburg, Salmon Janse; Trusler, Winston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for the combustion of waste liquids in connection with recovering of chemicals from the waste liquid, preferably black liquor from pulp production whereby the liquid (5 A) is injected at a given level (4) into a furnace (1 2, 3) in which the, liquid (5 A) initially is dried and the solid remainder thereafter is pyrolysed and finally burned and the chemicals are assembled on the bottom of the furnace while the exhaust gases (8) are going up through and out from the furnace (1, 2, 3) and whereby a part of the combustion air so called primary air (11), is supplied at one or more levels (6) below said level (4) of liquid injection (5 A) and another part …
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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 June 4, 1992 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2014.
- 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.