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:
Nov. 02, 2004
Filed:
Sep. 19, 2002
Applicant:
Inventors:
Yoshio Kita, Nishinomiya, JP;
Yasuhiro Yamasaki, Neyagawa, JP;
Assignee:
Orient Chemical Industries, Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 5/047 ; H01B 1/00 ;
U.S. Cl.
CPC ...
G03G 5/047 ; H01B 1/00 ;
Abstract
The present invention intends to provide a TPD derivative being excellent in electric properties as a compound due to its extremely less content of impurities (TPD analogues) as well as being excellent in film-forming property due to its low crystallinity. The TPD derivative is a mixed substance of triphenylamine dimers which contains at least the compound represented by formula B: