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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve Co Ltd
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 filed by Mullard Radio Valve Co LtdfiledCriticalMullard Radio Valve Co Ltd
Application grantedgrantedCritical
Publication of FR609074ApublicationCriticalpatent/FR609074A/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
H01J9/042—Manufacture, activation of the emissive part
Landscapes
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Non-Portable Lighting Devices Or Systems Thereof
(AREA)
Discharge Lamp
(AREA)
FR609074D1925-01-151926-01-09Procédé de fabrication de cathodes à incandescence pour tubes à décharge électrique et appareils analogues
ExpiredFR609074A
(fr)