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CPC Subgroup Additional Only
H01J 2893/0074

Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control

Full Title

Discharge tubes and lamps > Disassembly or repair of discharge tubes > Discharge tubes with liquid poolcathodes; constructional details > Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control

6 direct subcodes

Child Classifications

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  • H01J 2893/0082 Returning condensed electrode material to the cathodic cup, e.g. including cleaning
  • H01J 2893/0083 Liquid electrode level control
  • H01J 2893/0084 Protection against mercury deposition
  • H01J 2893/0086 Gas fill; Maintaining or maintaining desired pressure; Producing, introducing or replenishing gas or vapour during operation of the tube; Getters; Gas cleaning; Electrode cleaning
  • H01J 2893/0087 Igniting means; Cathode spot maintaining or extinguishing means

Top Applicants

Top 10 applicants by patent filingsfor 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