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PCE
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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

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  • 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

Top Applicants

Top Applicants (IPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 37,897
  2. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
  3. APPLIED MATERIALS US 21,640
  4. LG ENERGY SOLUTION KR 20,770
  5. LG CHEM KR 19,835
  6. TOKYO ELECTRON JP 18,519
  7. ROBERT BOSCH DE 14,595
  8. INTEL CORPORATION US 13,580
  9. MURATA MANUFACTURING COMPANY JP 12,151
  10. SAMSUNG SDI COMPANY KR 12,080