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:
May. 20, 2014
Filed:
Jun. 08, 2007
Applicants:
Kazumasa Nagao, Otsu, JP;
Seiichiro Murase, Otsu, JP;
Inventors:
Kazumasa Nagao, Otsu, JP;
Seiichiro Murase, Otsu, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 51/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a light emitting device material which enables a light emitting device having high efficiency and excellent chromatic purity and durability using a light emitting device material containing a pyrene compound represented by formula (1), wherein any one of Rto Ris a group represented by formula (2), or 1 to 4 substituents is/are group(s) represented by formula (3), and a light emitting device using the same.