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IPC Subgroup
H01J 1/4

forming part of the envelope of the tube or lamp

Introduced: September 1968

Last revised: January 2006

Full Title

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 > Main electrodes > Solid anodes; Solid auxiliary anodes for maintaining a discharge > forming part of the envelope of the tube or lamp

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS