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:
Feb. 24, 2004
Filed:
Aug. 27, 2001
Hiroshi Yamada, Yokohama, JP;
Manabu Uchida, Yokohama, JP;
Takaharu Nakano, Yokohama, JP;
Kenji Furukawa, Yokohama, JP;
Chisso Corporation, Osaka, JP;
Abstract
Use of an organic EL device comprising a dipyridylthiophene derivative represented by the following general formula (1) has made it possible to provide an organic EL device with high luminous efficiency at low voltage. Provided that in the formula, X is S or SO , R and R each independently represent a hydrogen atom, an alkyl group of 1-6 carbons, an alkenyl group of 2-6 carbons, an alkoxy group of 1-6 carbons, an aryloxy group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, with the proviso that when R and R each independently represent an alkenyl, alkoxy, aryl or heterocyclic group they may be bonded together but not into a benzo condensed ring, and A and A are independently a 2-pyridyl group or 3-pyridyl group