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:
Jun. 26, 2007
Filed:
Jul. 12, 2002
Toshihiro Iwakuma, Chiba, JP;
Takashi Arakane, Chiba, JP;
Tadashi Kusumoto, Chiba, JP;
Petroleum Energy Center, A Juridical Incorporated Foundation, Tokyo, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A novel aromatic compound represented by following general formula (I): among Xto Xin general formula (I), (1) at least four each independently represent a linear or branched alkoxyl group having 1 to 6 carbon atoms, and others each represent hydrogen atom; (2) at least one represents a linear or branched alkyl group having 1 to 6 carbon atoms, at least one represents a linear or branched alkoxyl group having 1 to 6 carbon atoms, a total of a number of the alkyl group and a number of the alkoxyl group being 4 or greater, and others each represent hydrogen atom; (3) at least six each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms, and others each represent hydrogen atom; or (4) at least four each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms, two among said alkyl groups having 3 to 6 carbon atoms, and others each represent hydrogen atom; and an organic electroluminescence device using the aromatic compound, are provided. The device exhibits excellent purity of color, provides great luminance of emitted light and efficiency of light emission even at a small driving voltage, has a long lifetime and emits reddish light.