Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2011-03-29
2011-03-29
Garrett, Dawn (Department: 1786)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S498000, C313S504000, C313S506000, C564S427000, C257S040000
Reexamination Certificate
active
07914911
ABSTRACT:
It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2to R4and R7to R9are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.
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Kojima Kumi
Nomura Ryoji
Seo Satoshi
Yamagata Sachiko
Garrett Dawn
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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