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DIFF Subgroup
C23F 13/20

Conducting electric current to electrodes

Introduced: January 1990

Full Title

Inhibiting corrosion of metals by anodic or cathodic protection > cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions > Constructional parts, or assemblies of cathodic-protection apparatus > Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto > Conducting electric current to electrodes

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class C23,2013–2023, worldwide · Source: EPO PATSTAT

  1. APPLIED MATERIALS US 8,096
  2. TOKYO ELECTRON JP 3,985
  3. CHINESE ACADEMY OF SCIENCES 2,842
  4. LAM RESEARCH CORPORATION US 2,654
  5. TOKYO ELECTRON 2,540
  6. NIPPON STEEL CORPORATION JP 2,465
  7. JFE STEEL JP 2,368
  8. ASM IP HOLDING NL 2,092
  9. APPLIED MATERIALS 1,877
  10. POSCO (POHANG IRON AND STEEL COMPANY) KR 1,782

Top Applicants (CPC)

Class C23,2013–2023, worldwide · Source: EPO PATSTAT

  1. APPLIED MATERIALS US 10,596
  2. TOKYO ELECTRON JP 5,229
  3. LAM RESEARCH CORPORATION US 3,622
  4. NIPPON STEEL CORPORATION JP 3,171
  5. JFE STEEL JP 3,128
  6. ASM IP HOLDING NL 2,722
  7. ARCELORMITTAL LU 2,481
  8. TOKYO ELECTRON 2,359
  9. APPLIED MATERIALS 2,284
  10. CHINESE ACADEMY OF SCIENCES 2,110