Metal processing or recovery
CA 2118942 A1 · Owner: Stein Atkinson Stordy Limited · Inventors: Perry, Ophneil Henry; Lewis, Keith Clive
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Continuous melting of lightweight shredded metal e.g. in the, recycling of aluminium can scrap uses apparatus as shown in the, figure 1 the scrap portions being fed into the top of a melting chamber (12) to be acted on by an upward flow of gases at controlled velocity, preferably recirculated from the top to the bottom by a fan (18), and heated to a temperature in excess of the metal melting point; the portions being borne in the flow within the chamber until they melt into denser droplets or globules which drop from the chamber to collect in a holding furnace (26).
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 September 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 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.