ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,392, issued on Sept. 23, was assigned to CellMo Materials and Innovation Inc. (Conroe, Texas).

"Gas sensor device based on metal oxide foam" was invented by Hyeji Park (Seoul, South Korea), Hee Chul Lee (Gyeonggi-do, South Korea), Gigap Han (Chungcheongnam-do, South Korea) and Heeman Choe (Conroe, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensiti...