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:
Nov. 23, 2010
Filed:
Jul. 10, 2006
Sachiko Kawakami, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Harue Nakashima, Kanagawa, JP;
Kumi Kojima, Tokyo, JP;
Masakazu Egawa, Kanagawa, JP;
Ryoji Nomura, Kanagawa, JP;
Sachiko Kawakami, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Harue Nakashima, Kanagawa, JP;
Kumi Kojima, Tokyo, JP;
Masakazu Egawa, Kanagawa, JP;
Ryoji Nomura, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
Abstract
An object is to provide a carbazole derivative that is useful as a raw material in manufacturing a light emitting element material having resistance to repetition of an oxidation reaction. The carbazole derivative is represented by General Formula (1) in the following. In General Formula (1), Rrepresents any one selected from an alkyl group having 1 to 4 carbon atoms such as methyl, ethyl, and tert-butyl, and an aryl group having 1 to 12 carbon atoms such as phenyl, biphenyl, and naphthyl.