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:
Oct. 28, 2014
Filed:
Jan. 31, 2005
Yasunori Uetani, Tsukuba, JP;
Jun Oguma, Tsukuba, JP;
Makoto Anryu, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
An organic electroluminescence device wherein a light emitting layer exists between electrodes composed of an anode and a cathode, a layer (L) containing a polymer compound exists between the light emitting layer and the anode and the polymer compound contains a repeating unit of formula (1): wherein, Ar, Ar, Arand Arrepresent each independently an arylene group or divalent heterocyclic group; E, Eand Erepresent each independently aryl group (A) or heterocyclic group (B); a and b represent each independently 0 or 1, and 0≦a+b≦1; aryl group (A) is an aryl group having three or more substituents; and heterocyclic group (B) is a monovalent heterocyclic group having one or more substituents in which the sum of the number of the substituents and the number of hetero atoms of the heterocycle is 3 or more.