US Patent Issued to IDEMITSU KOSAN on Sept. 23 for "Compounds, materials for organic electroluminescent devices, organic electroluminescent devices, and electronic devices" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,450, issued on Sept. 23, was assigned to IDEMITSU KOSAN Co. LTD. (Tokyo).

"Compounds, materials for organic electroluminescent devices, organic electroluminescent devices, and electronic devices" was invented by Keiichi Yasukawa (Chiyoda-ku, Japan), Hiromi Nakano (Chiyoda-ku, Japan), Hisato Matsumoto (Chiyoda-ku, Japan) and Toshinari Ogiwara (Chiyoda-ku, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound of formula (11) to (13)wherein R1 to R4 are each independently D1 of a formula (1-1) etc. or D2 of a formula (2-1) etc.at least one of R1 to R4 being D1, and at least one of R1 to R4 being D2. In (1-1) and (2-1), X1 is O or S, R101 to ...