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:
Aug. 21, 2007
Filed:
Jul. 12, 2002
Takanobu Noguchi, Tsukuba, JP;
Shuji Doi, Tsukuba, JP;
Takanobu Noguchi, Tsukuba, JP;
Shuji Doi, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A polymeric fluorescent substance exhibiting visible fluorescence in the solid state, having polystyrene reduced number average molecular weight of 1×10to 1×10, and comprising one or more repeating units of following formula (1), wherein Arand Areach independently represent an arylene group or the like; Arrepresents an aryl group or the like having one or more substituents of formula (2) as nuclear substitution; X represents —CR═CR— or —C≡C—; and n is 0 or 1,—Y—Ar  (2)wherein Arrepresents an aryl group or the like; and Y represents —CR═CR— or —C≡C—. The triarylamine type polymeric fluorescent substance is excellent in quantum yield of fluorescence and in light emitting efficiency when made into a device.