US Patent Issued to IDEMITSU KOSAN on Nov. 4 for "Compound and organic electroluminescent element using same" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,464,943, issued on Nov. 4, was assigned to IDEMITSU KOSAN Co. LTD. (Chiyoda-ku, Japan).

"Compound and organic electroluminescent element using same" was invented by Hirokatsu Ito (Ichihara, Japan), Tasuku Haketa (Chiba, Japan) and Yu Kudo (Chiba, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound that is capable of achieving an organic EL device that has a high external quantum efficiency and a long lifetime is to be provided, and a compound represented by the following formula (1) is used (wherein in the formula, R11 to R17, R21 to R28, R31 to R38, R41 to R45, R51 to R55, R61 to R64, and L1 are defined in the description)."

The patent was ...