ALEXANDRIA, Virginia, Sept. 26 -- ELECTRASTEEL, INC., Boulder, Colorado has been assigned a patent (No. US 11767604 B2, initially filed Aug. 9, 2022) developed by five inventors Ai Quoc Pham, Boulder, Colorado; Sandeep Nijhawan, Boulder, Colorado; Adolfredo Alvarez, Boulder, Colorado; Colleen Wallace, Boulder, Colorado; and Steven Fatur, Boulder, Colorado, for "2-step iron conversion system." . . .