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IPC Main Group
C23F 14/00

Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes

Introduced: September 1968

Last revised: January 2006

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:
NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES; INHIBITING CORROSION OF METALLIC MATERIAL; INHIBITING INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS AND AT LEAST ONE PROCESS COVERED BY SUBCLASS OR OR CLASS

Filing statistics

IPC C23F 14/00 belongs to the parent subclass C23F, which recorded 31,124 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,345 in 2013 to 2,505 in 2023 (+7%), peaking at 3,091 applications in 2014. 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

Related Keywords

inhibiting INCRUSTATION

1 direct subcode

Child Classifications

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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