The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2018
Filed:
Sep. 01, 2014
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Yumiko Mizuki, Basel, CH;
Hirokatsu Ito, Ichihara, JP;
Tasuku Haketa, Chiba, JP;
Tomoharu Hayama, Utsunomiya, JP;
Kazuki Nishimura, Sodegaura, JP;
Masahiro Kawamura, Chiba, JP;
Mitsuru Shibata, Chiba, JP;
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Abstract
A novel carbazole derivative represented by formula (1) in which two or more groups each having a specific structure, such as a carbazolyl group, are bonded to two or more of 2-, 3- and 4-positions of the carbazole derivative is useful as a material for organic electroluminescence devices. A material for organic electroluminescence devices including the carbazole derivative, an organic electroluminescence device employing the carbazole derivative, and an electronic equipment are described. wherein at least two selected from Bto Bare represented by formula (2) and A, Xto X, L, n, Y, and Rto Rare as defined in claim