Method of recovering glass and metal from solid residues produced in refuse incineration plants
CA 2114486 A1 · Owner: Von Roll Ag · Inventors: Schoener, Peter; Pfluegl, Karl-Heinz; Kiethe, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Glass and metal are recovered separately by melting from the solid residues produced in a refuse incineration plant particularly from slag. The melting is effected in two zones. In the first top melting zone the oxidic constituents of the residues are converted into a glass melt. In the second bottom melting zone the metallic constituents of the residues are converted at a higher temperature into a metal melt. The two melts are recovered separately.
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 January 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.