ALEXANDRIA, Va., Aug. 18 -- United States Patent no. 12,709,627, issued on Aug. 18, was assigned to Sumitomo Chemical Co. Ltd. (Tokyo).
"Compound" was invented by Takuma Aoki (Osaka, Japan), Tomohiro Nakayama (Osaka, Japan), Tetsuo Akasaka (Osaka, Japan), Takahiro Kurogi (Osaka, Japan) and Hirofumi Hamaki (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a compound represented by formula (I) or formula (II) capable of reducing the color difference before and after post-baking.[In the formula (I), R1 represents a C2-C20 unsaturated hydrocarbon group optionally having a substituent; R2 represents a hydrogen atom, a C1-C20 hydrocarbon group optionally having a substitue...