ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,639, issued on April 15, was assigned to HYUNDAI MOTOR COMPANY (Seoul, South Korea) and KIA Corp. (Seoul, South Korea).
"Method for preparing hydrogen gas" was invented by Byeong Soo Shin (Uiwang-si, South Korea), Kyung Moon Lee (Uiwang-si, South Korea), Young Jin Cho (Gimhae-si, South Korea), Yong Ha Park (Suwon-si, South Korea), Hoon Mo Park (Seongnam-si, South Korea) and Dong Hoon Nam (Suwon-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing hydrogen gas includes a decomposition step, a first adsorption step, a second adsorption step, a first regeneration step, a third heat-exchange step, and a second regeneratio...