Pyrometallurgical copper refining
CA 1322659 C · Owner: Marcuson, Samuel Walton · Inventors: Diaz, Carlos Manuel; Marcuson, Samuel Walton; Bell, James Alexander Evertr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A copper converting process starting with white metal or a mixture of white metal and metallic copper in which oxidizing gas contacts the molten copper mass either at or near the top surface of the molten mass while the mass is sparged with an inert gas from at or near the bottom of the mass and sparging is continued after contact with the oxidizing gas ceases.
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 October 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 5, 2010.
- 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.