ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,996, issued on April 29, was assigned to DuPont Specialty Materials Korea Ltd. (South Korea).
"Plurality of host materials and organic electroluminescent device comprising the same" was invented by So-Young Jung (Gyeonggi-do, South Korea), Su-Hyun Lee (Gyeonggi-do, South Korea), Mi-Ja Lee (Gyeonggi-do, South Korea), Doo-Hyeon Moon (Gyeonggi-do, South Korea) and Sang-Hee Cho (Gyeonggi-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by...