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:
Mar. 23, 2010
Filed:
Nov. 21, 2005
Mitsunori Ito, Chiba, JP;
Hiroshi Yamamoto, Chiba, JP;
Satoshi Hachiya, Chiba, JP;
Hisayuki Kawamura, Chiba, JP;
Mitsunori Ito, Chiba, JP;
Hiroshi Yamamoto, Chiba, JP;
Satoshi Hachiya, Chiba, JP;
Hisayuki Kawamura, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A fluorene-based derivative having a specific structure and an organic electroluminescence device in which an organic thin film layer comprising a single layer or plural layers including at least a light emitting layer is sandwiched between a cathode and an anode, wherein at least one layer of the organic thin film layers described above comprises the above fluorene-based derivative having a specific structure in the form of a single component or a mixed component. The organic electroluminescence device has a high luminous efficiency, and the fluorene-based derivative materializes the same.