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PCE
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DIFF Main Group
C23D 5/00

Coating with enamels or vitreous layers

Introduced: September 1968

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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  • C23D 5/005 CPC only CPC only
  • C23D 5/02 by wet methods IPC+CPC Available in IPC and CPC
  • C23D 5/04 by dry methods IPC+CPC Available in IPC and CPC
  • C23D 5/06 producing designs or letters IPC+CPC Available in IPC and CPC
  • C23D 5/08 Applying enamels non-uniformly over the surface IPC+CPC Available in IPC and CPC
  • C23D 5/10 CPC only CPC only

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