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:
Oct. 26, 1976
Filed:
Oct. 07, 1974
Applicant:
Inventors:
John E White, Cleveland Heights, OH (US);
Ranajit K Datta, E. Cleveland, OH (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313184 ; 313 / ; 313213 ; 313218 ; 313229 ; 3133 / ;
Abstract
An improved electrode particularly suitable for operation at high current densities in vapor discharge lamps in which the pressure is upwards of 1 atmosphere. It comprises a porous matrix of refractory metal impregnated with a glassy emission material which becomes fluid or produces a fluid component at the operating temperature. The emission material comprises a low work function metal oxide and a glass forming component, preferred emission materials being lanthanum borate and lanthanum silicate.