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:
Apr. 13, 2004
Filed:
Mar. 15, 2001
Applicant:
Inventors:
Toshihiro Ohnishi, Tsukuba, JP;
Takanobu Noguchi, Tsukuba, JP;
Yoshiaki Tsubata, Tsukuba, JP;
Masato Ueda, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 ; B05D 5/12 ; C09K 1/102 ; H05B 3/300 ;
U.S. Cl.
CPC ...
G02F 1/1335 ; B05D 5/12 ; C09K 1/102 ; H05B 3/300 ;
Abstract
A polymeric fluorescent substance or polymeric fluorescent substance solution is disclosed which can attain higher luminous efficiency as a polymer LED. The polymeric fluorescent substance has a specific content of water or poor solvent. Also disclosed is an organic electroluminescence device comprising at least one light-emitting layer that contains substantially no particle-like foreign materials having a diameter of more than 1 &mgr;m and that has few dark spots.