ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,953, issued on May 6.
"Dual-packer injection leaching system and method" was invented by David Gilbert (Denver) and Grant Bonin (North Vancouver, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dual packer injection leaching system with a dual packer assembly and a support structure. The dual packer assembly has an upper packer, a lower packer, and a high dispersion screen disposed between the upper packer and the lower packer. The dual packer assembly is configured to be disposed within a borehole in a leach pile. The support structure is configured to support the dual packer assembly within the borehole. A wire rope couples the support str...