Process for continuous copper smelting
CA 2055842 C · Owner: Goto, Moto · Inventors: Goto, Moto; Kikumoto, Nobuo; Iida, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a process for continuous copper smelting. At first a smelting furnace, a separating furnace a converting, furnace, melt launders for connecting the smelting furnace the, separating furnace and the converting furnace in series a plurality , of anode furnaces and blister copper launders for connecting the converting furnace and the anode furnaces are provided. Then copper concentrate is introduced in the smelting furnace and melted and oxidized into a mixture of matte and slag. The mixture is received in the separating furnace and the matte is separated from the slag. Subsequently, the matte separated from the slag is oxidized to produce blister copper. Subsequently the …
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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 November 19, 1991 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 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.