Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H01J 1/14

characterised by the material

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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 thermionic cathodes > characterised by the material

CPC:

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 (details of electron-optical or ion-optical arrangements H01J3/00) > Main electrodes > Solid thermionic cathodes > characterised by the material

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

IPC defines codes here since 1995.

Child Classifications

Navigate with arrow keys, Enter to open

  • H01J 1/142 with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material since 1995 IPC+CPC Available in IPC and CPC
  • H01J 1/144 with other metal oxides as an emissive material since 1995 IPC+CPC Available in IPC and CPC
  • H01J 1/146 with metals or alloys as an emissive material since 1995 IPC+CPC Available in IPC and CPC
  • H01J 1/148 with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material since 1995 IPC+CPC Available in IPC and CPC