Process for obtaining metal values by leaching raw sea nodules
CA 1077725 A · Owner: Inco Limited · Inventors: Glaum, Gerald V.; Subramanian, Kohur N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal values are extracted from a manganiferous oxide ore, particularly sea nodules, containing non-ferrous metal values selected from the group consisting of nickel cobalt and copper, by leaching the raw ore in an acidic medium under atmospheric pressure and in the presence of a sulfide to reduce the tetravalent manganese to the soluble divalent state, thereby oxidizing the sulfide to elemental sulfur, and simultaneously to solubilize metal values in the leach solution.
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 May 20, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 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.