ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,517, issued on July 29, was assigned to LG CHEM Ltd. (Seoul, South Korea).

"Catalyst loading method and method for preparation of butadiene by using same" was invented by Ye Seul Hwang (Daejeon, South Korea), Daeheung Choi (Daejeon, South Korea), Myungji Suh (Daejeon, South Korea), Sunhwan Hwang (Daejeon, South Korea), Dong Hyun Ko (Daejeon, South Korea), Kyong Yong Cha (Daejeon, South Korea) and Jun Kyu Han (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a ca...