Method of concentrating sludges
CA 1293097 C · Owner: Kiiskila, Erkki · Inventors: Kiiskila, Erkki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of concentrating sludges In a method of concentrating sludges, liquor is heated under pressure indirectly with flue gases from the combustion of previously concentrated sludge after which the sludge is caused to expand or subjected to reduced pressure which results in evaporation of water and concentration of the sludge to A dry-substance content of over 55 %.
Read the whole patent
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
- Granted December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.