US Patent Issued to PARIS SCIENCES ET LETTRES, ECOLE NATIONALE SUPERIEURE DE CHIMIE DE PARIS on April 8 for "Method for extracting a refractory metal from an ore, a concentrate or a waste product" (French Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,089, issued on April 8, was assigned to PARIS SCIENCES ET LETTRES (Paris) and ECOLE NATIONALE SUPERIEURE DE CHIMIE DE PARIS (Paris).

"Method for extracting a refractory metal from an ore, a concentrate or a waste product" was invented by Gregory Lefevre (Sainte-Genevieve-des-Bois, France) and Thomas Degabriel (Sannois, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method for extracting a refractory metal selected from Nb, Ta, Mo, W and V, from a solid material comprising the refractory metal in an oxidised form, the method using a layered double hydroxide, and the use of a layered double hydroxide for extra...