Method and installation for thermal disposal of sewage sludge
CA 2042957 A1 · Owner: Brunner, Matthias · Inventors: Brunner, Matthias; Coenen, Hubert; Hubert, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for thermal disposal of sewage sludge by drying, incineration and flue gas dedusting and flue gas washing. The method is characterized in that the ashes and flue gas dust resulting from combustion and the contaminated sludge occuring during flue gas washing are treated together with high temperature combustion with melting of solids.
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 May 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2013.
- 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.