Process for the separation of copper and heavy metals from incinerated garbage residue and slag
CA 2216714 A1 · Owner: Edlinger, Alfred · Inventors: Edlinger, Alfred; Resch, Heribert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for the separation of copper and heavy metals from incinerated garbage residue and slag, the residue and slag from garbage incineration or pyrolysis is heated to over 650 ~C under reducing conditions together with substances containing chlorine or chlorides such as flue gas cleaning , residues, CaCl2 from the soda production cooking salt, organic solvents or , electroplating sludge containing chlorine whereupon Cu-chlorides and volatile , heavy metal chlorides such as PbCl2 or ZnCl2, are drawn off in the gas phase.
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 February 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2019.
- 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.