ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,525, issued on Sept. 15, was assigned to TOHO TITANIUM Co. LTD. (Yokohama, Japan).

"Method for producing catalyst for polymerization of olefin, catalyst for polymerization of olefin, and method for producing polymer of olefin" was invented by Hiroyuki Kono (Chigasaki, Japan), Takaharu Sakemi (Chigasaki, Japan), Toshiya Uozumi (Chigasaki, Japan) and Keisuke Goto (Chigasaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method for producing a catalyst for polymerization of an olefin, which suppresses a decrease in polymerization activity due to early deactivation of the active site after the catalyst has been f...