ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,545, issued on Sept. 30, was assigned to ECOFILL GROUP Ltd. (Leeds Yorkshire, Great Britain).
"Screening hopper" was invented by Trevor Gaughan (Leeds, Great Britain) and David Bowie (Suffolk, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for producing a construction material for use in the building industry is disclosed. The apparatus comprises a hopper (10) which includes a trough (11) having a base section and an open top to allow material to be added to the hopper. The base section of the hopper includes a grinding array (24). A separation array (152) is deployed above the open top with the separation array comprisin...