Metal recovery
CA 1257482 A · Owner: Anglo Operations Limited · Inventors: Davidson, Raymond J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method of recovering gold values from an activated carbon support which includes placing the support with the gold values adsorbed thereon in a column having a first end and a second end, introducing deionised water as an eluant into the column near the second end collecting the eluant containing the gold values near the first end of the column, while continuing the flow of eluant through the column, periodically removing a portion of the activated carbon support from which substantially all the gold values have been eluted from the column and replacing the, removed portion of the support with a further amount of the support having metal values captured thereon. …
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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
- Granted July 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 18, 2006.
- 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.