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:
Mar. 04, 2003
Filed:
Sep. 28, 2001
Applicant:
Inventors:
Tadao Nakaya, Tokyo, JP;
Takao Yamauchi, Yokohama, JP;
Akio Tajima, Ebina, JP;
Hidemasa Mouri, Yokohama, JP;
Assignee:
Taiho Industries Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 1/106 ; C07D / ;
U.S. Cl.
CPC ...
C09K 1/106 ; C07D / ;
Abstract
The object of this invention is to provide an illuminant, which can easily be produced at low cost. This invention is a carbazole derivative luminescent compound having a carbazole ring skeleton, to the nitrogen atom of which is attached an electron-donating group, and to the carbon atom of which is attached an electron-attracting group at the third position to the nitrogen atom.