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:
Jun. 02, 1998
Filed:
Jul. 31, 1996
Applicant:
Inventors:
Assignee:
Toyo Ink Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05D / ; C09K / ;
U.S. Cl.
CPC ...
25230116 ; 313504 ; 428690 ;
Abstract
A light-emitting material of the following general formula �1! for an organic electroluminescence device, ##STR1## wherein each of A.sup.1 to A.sup.4 is a substituted or unsubstituted aryl group having 6 to 16 carbon atoms, and each of R.sup.1 to R.sup.8 is independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group or a substituted or unsubstituted amino group, provided that adjacent substituents may form an aryl ring.