US Patent Issued to VALUNOR on March 17 for "Expandable silica particles and methods for making and using the same" (Norwegian, Swiss Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,150, issued on March 17, was assigned to VALUNOR AG (Zug, Switzerland).

"Expandable silica particles and methods for making and using the same" was invented by Finn Erik Solvang (Noetteroey, Norway) and Norman Blank (Rueschlikon, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure concerns expandable silica particles having a coating comprising talc powder and kaolin powder provided on the outer surface of the expandable silica particle and expandable and expanded silica particles comprising silica fume and/or ultrafine quartz silica sand beneath the surface of the particles. Methods for producing expandable and expand...