H01J19/14 - CPC Classification Index

ClassID:

204801 ⎘

H01J19/14 - CPC Classification

Classification description:

Details of vacuum tubes of the types covered by group; Electron-emitting electrodes; Cathodes; Thermionic cathodes Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Sub-classes:

H01J19/16 » Heaters 2
H01J19/18 » Insulating layer or body located between heater and emissive material 0
H01J19/20 » Supports for the emissive material 1
H01J19/22 » Dispenser-type cathodes, e.g. L-cathode 1

Recent Application in this class:

20120256097

2012-10-11

Indirectly heated cathode cartridge design