Legal status (The legal status 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 status listed.)
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
Application grantedgrantedCritical
Publication of FR671507ApublicationCriticalpatent/FR671507A/fr
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/02—Manufacture of electrodes or electrode systems
H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
Landscapes
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Solid Thermionic Cathode
(AREA)
FR671507D1928-03-161929-03-15Cathode à incandescence à chauffage indirect pour récipients de décharge, spécialement pour les lampes électroniques
ExpiredFR671507A
(fr)