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:
Jul. 06, 2021
Filed:
Mar. 07, 2018
Applicant:
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Inventors:
Hirokatsu Ito, Ichihara, JP;
Tasuku Haketa, Chiba, JP;
Yu Kudo, Chiba, JP;
Yumiko Mizuki, Bunkyo-ku, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 407/12 (2006.01); H01L 51/00 (2006.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
C07D 407/12 (2013.01); H01L 51/006 (2013.01); H01L 51/0052 (2013.01); H01L 51/0072 (2013.01); H01L 51/0073 (2013.01); H01L 51/5012 (2013.01); H01L 51/5056 (2013.01);
Abstract
A compound represented by formula (1): wherein Rto R, Rto R, Lto L, a to c, n, and Ar are as defined in the description,provides an organic electroluminescence device having an emission efficiency and a device lifetime further improved.