ALEXANDRIA, Va., July 16 -- United States Patent no. 12,357,963, issued on July 15, was assigned to TOSOH Corp. (Yamaguchi, Japan).

"YFI-structure zeolite composition, hydrocarbon adsorbent, and method for adsorbing hydrocarbons" was invented by Toyohiro Usui (Yamaguchi, Japan), Keita Nakao (Yamaguchi, Japan) and Naoto Nakazawa (Yamaguchi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composition is provided that has heat resistance sufficient for use as a hydrocarbon adsorbent and desorbs hydrocarbons slowly with respect to an increase in temperature. The composition includes an alkali metal and a zeolite having a YFI structure. A content of the alkali metal is 1 to 40 mass % based on a total mass ...