ALEXANDRIA, Va., June 12 -- United States Patent no. 12,302,749, issued on May 13, was assigned to KONICA MINOLTA INC. (Tokyo).
"Imide derivative, luminescent composition containing same, luminous thin film, and luminous particles" was invented by Shumpei Hitosugi (Hachioji, Japan), Yasuo Miyata (Yokohama, Japan) and Shuho Tanimoto (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An imide derivative has a structure represented by general formula (1) below.In the general formula (1), a plurality of R1 each independently represent a hydrogen atom or a substituent. At least one R1 represents a group having 4 to 30 carbon atoms. A benzene ring or naphthalene ring optionally further has a substituen...