ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,134, issued on June 17, was assigned to Mitsui Mining & Smelting Co. Ltd. (Tokyo).
"Hydrocarbon adsorbent" was invented by Mayuko Suwa (Saitama, Japan) and Hidekazu Goto (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are: a hydrocarbon adsorbent capable of adsorbing hydrocarbons, storing the adsorbed hydrocarbons up to a relatively high temperature, and desorbing the adsorbed and stored hydrocarbons at a relatively high temperature; an exhaust gas purifying catalyst composition using the same; an exhaust gas purifying catalyst; and a method for treating an exhaust gas. The hydrocarbon adsorbent comprises a zeolite having an ...