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.)
Compagnie des Lampes
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie des Lampes
Compagnie Francaise Thomson Houston SA
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Filing date
Publication date
Application filed by Compagnie des Lampes, Compagnie Francaise Thomson Houston SAfiledCriticalCompagnie des Lampes
Application grantedgrantedCritical
Publication of FR815124ApublicationCriticalpatent/FR815124A/en
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
H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
FR815124D1935-12-181936-12-17
Improvements to heated cathode devices
ExpiredFR815124A
(en)