ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,761, issued on May 6, was assigned to NOVA MINERALIS S.A. (Santiago, Chile).

"Solid-liquid-solid method for the solubilisation of copper minerals and concentrates, independent of the redox potential and with low consumption of water and acid" was invented by Rodrigo Andres Cortes Cortes (Region Metropolitana, Chile).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a chemical and physical hydrometallurgical method with solid-liquid-solid interaction for the solubilization of copper sulphides, by Selective Transformation and Precipitation of soluble, chlorinated, copper species, where said method does not depend on the re...