Process and installation for treating waste liquids, in particular industrial waste water with a high solids content
CA 2106584 C · Owner: Winter Umwelttechnik Gmbh · Inventors: Hellmann, Claus; Hording, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention refers to a method and an apparatus for processing waste liquid, in particular industrial waste water of high solids content, characterized by the following steps:, a) spraying and evaporating the waste liquid together with a dry gas, in particular dry air in a counterflow of dry gas, in particular dry air in a spray tower b) collecting the solids of the waste water in a lower section of the spray tower, c) discharging the moist gas from an upper section of the spray tower and bringing the moist gas in heat exchange with an evaporator of a refrigerating means,wherein the liquid condensed from the evaporator is collected d) bringing the cooled dry gas in heat exchange …
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
- Filed March 11, 1992 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.