CPC Main Group Additional Only
C23C 2222/00 Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
2 direct subcodes
Child Classifications
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- C23C 2222/10 Use of solutions containing trivalent chromium but free of hexavalent chromium
- C23C 2222/20 Use of solutions containing silanes
Top Applicants
Top 10 applicants by patent filingsfor class C23, 2013–2023, worldwide · Source: EPO PATSTAT
- APPLIED MATERIALS US 10,596
- TOKYO ELECTRON JP 5,229
- LAM RESEARCH CORPORATION US 3,622
- NIPPON STEEL CORPORATION JP 3,171
- JFE STEEL JP 3,128
- ASM IP HOLDING NL 2,722
- ARCELORMITTAL LU 2,481
- TOKYO ELECTRON 2,359
- APPLIED MATERIALS 2,284
- CHINESE ACADEMY OF SCIENCES 2,110