ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,151, issued on Oct. 6, was assigned to HANWHA SOLUTIONS Corp. (Seoul, South Korea).
"Method for preparing isocyanate compound" was invented by Ju Won Min (Daejeon, South Korea) and Hyun Cheol Ryu (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method for preparing an isocyanate compound. According to the present invention, provided is a method for preparing an isocyanate compound that can recover and reuse materials used in the reaction during the preparation of an isocyanate compound using phosgene, and can minimize thermal denaturation of a reaction product and formation of by-products."
The ...