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IPC Main Group
C23C 4/00

Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge

Introduced: January 1985

Last revised: January 2016

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
Subclass:
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL

Filing statistics

IPC C23C 4/00 belongs to the parent subclass C23C, which recorded 286,666 patent applications worldwide between 2013 and 2023. Annual filings grew from 21,184 in 2013 to 29,510 in 2023 (+39%), peaking at 30,405 applications in 2020. The most active applicants in class C23 are APPLIED MATERIALS (8,096 applications), TOKYO ELECTRON (3,985 applications) and CHINESE ACADEMY OF SCIENCES (2,842 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Build-up welding

Related Keywords

features of spraying METAL(S)other features for coating by SPRAYING metals

5 direct subcodes

Child Classifications

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  • C23C 4/01 Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
  • C23C 4/02 Pretreatment of the material to be coated, e.g. for coating on selected surface areas
  • C23C 4/18 After-treatment

Top Applicants

Top 10 applicants by patent filingsfor 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