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:
Sep. 06, 2011
Filed:
Jul. 27, 2006
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Masanori Hotta, Kitakyushu, JP;
Yuichi Sawada, Kitakyushu, JP;
Takahiro Kai, Kitakyushu, JP;
Toshihiro Yamamoto, Kitakyushu, JP;
Masaki Komori, Kitakyushu, JP;
Masanori Hotta, Kitakyushu, JP;
Yuichi Sawada, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in structure and also disclosed is a heterocyclic compound useful for the said device. Specifically, the heterocyclic compound is represented by the following general formula (I) and the organic EL device comprises an organic layer containing the said heterocyclic compound. In general formula (I), Xand Xrespectively denote O, S, or N—R, R denotes a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, Ar, Ar, Ar, and Arrespectively denote a substituted or unsubstituted aryl group, Ar, Ar, and the nitrogen atom bonded thereto or Ar, Ar, and the nitrogen atom bonded thereto may form a nitrogen-containing hetero ring, and m and n respectively denote an integer of 1 or 2.