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:
Aug. 13, 2002
Filed:
Mar. 02, 2000
Applicant:
Inventors:
Munemitsu Hamada, Tokyo, JP;
Akira Takeishi, Tokyo, JP;
Makoto Takahashi, Tokyo, JP;
Dai Matsuoka, Tokyo, JP;
Masatada Yodogawa, Tokyo, JP;
Hiraku Harada, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01B 1/08 ; H01M 4/58 ;
U.S. Cl.
CPC ...
H01B 1/08 ; H01M 4/58 ;
Abstract
An electron-emitting electrode for discharge lamps etc. uses an electron-emitting material which contains a first metal component selected from Ba, Sr and Ca and a second metal component selected from Ta, Zr, Nb, Ti and Hf and also contains oxynitride perovskite. The electron-emitting material has restrained evaporation during electric discharge and a high resistance to ion sputtering.