Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H01J 19/14

Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Details of vacuum tubes of the types covered by group H01J21/00 > Electron-emitting electrodes; Cathodes > Thermionic cathodes > Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

  • H01J 19/16 Heaters IPC+CPC Available in IPC and CPC
  • H01J 19/18 Insulating layer or body located between heater and emissive material IPC+CPC Available in IPC and CPC
  • H01J 19/20 Supports for the emissive material IPC+CPC Available in IPC and CPC
  • H01J 19/22 Dispenser-type cathodes, e.g. L-cathode IPC+CPC Available in IPC and CPC