Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to NL6516879ApriorityCriticalpatent/NL6516879A/xx
Priority to ES0334795Aprioritypatent/ES334795A1/es
Priority to BE691653Dprioritypatent/BE691653A/fr
Publication of NL6516879ApublicationCriticalpatent/NL6516879A/xx
H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
H01J1/02—Main electrodes
H01J1/13—Solid thermionic cathodes
H01J1/14—Solid thermionic cathodes characterised by the material
