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. 20, 2010
Filed:
Nov. 29, 2001
Shuji Doi, Tsukuba, JP;
Yoshiaki Tsubata, Tsukuba, JP;
Takahiro Ueoka, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Takanobu Noguchi, Tsukuba, JP;
Shuji Doi, Tsukuba, JP;
Yoshiaki Tsubata, Tsukuba, JP;
Takahiro Ueoka, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Takanobu Noguchi, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A polymeric fluorescent substance exhibiting fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 1×10to 1×10, and comprising one or more repeating units of formula (1) and one or more repeating units of formula (8),—Ar—(CR═CR)—  (1)—Ar—(CR═CR)—  (8)wherein Arrepresents a specific arylene or a divalent heterocyclic compound group, and Arrepresent an arylene or a divalent heterocyclic compound group other than Ar. By using the polymeric fluorescent substance, a high performance polymer LED can easily be obtained.