Matte smelting
CA 1089900 A · Owner: Elkem-Spigerverket A/S · Inventors: Ydstie, Birger L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Improvements in matte smelting, are disclosed. A circular furnace is formed having a concave bottom, the, radius of curvature of the bottom being no greater than the diameter of the, circular furnace. The matte level is controlled to cover not more than half of the concave surface bottom. Advantageous positioning of the electrodes, tapping holes feed chutes and the like are also disclosed.
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
- Granted November 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 1997.
- 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.