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:
Jan. 10, 2012
Filed:
Jun. 10, 2009
Kiyoshi Itoh, Tokyo-to, JP;
Kiyoshi Itoh, Tokyo-to, JP;
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Abstract
The present invention provides a thiophene derivative useful for a material for forming an organic positive hole transport layer of an organic EL element excellent in light emitting efficiency, water resistance or the like, a polymer having the thiophene derivative as a monomer unit, and an organic EL element. The object can be solved by a thiophene derivative represented by the following formula (1), a polymer comprising the thiophene derivative, and an organic EL element, an organic positive hole transporting layer of which comprises the polymer: wherein, each 'X' is a halogen atom, which may be same or different from each other; and 'R' is an alkyl group.