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IPC Subgroup
H01J 3/4

Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection

Introduced: September 1968

Last revised: January 2006

Full Title

Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection

Classification Context

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

Related Keywords

TRAP(S) for particles in discharge tubes