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IPC Subgroup
C22C 21/12

with copper as the next major constituent

Introduced: July 1974

Last revised: January 2006

Full Title

Alloys based on aluminium > with copper as the next major constituent

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
Subclass:
ALLOYS

Filing statistics

IPC C22C 21/12 belongs to the parent subclass C22C, which recorded 218,000 patent applications worldwide between 2013 and 2023. Annual filings grew from 15,983 in 2013 to 19,051 in 2023 (+19%), peaking at 22,646 applications in 2017. The most active applicants in class C22 are JFE STEEL (7,152 applications), NIPPON STEEL CORPORATION (5,416 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (4,530 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class C22, 2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 7,152
  2. NIPPON STEEL CORPORATION JP 5,416
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,530
  4. JFE STEEL 3,986
  5. CENTRAL SOUTH UNIVERSITY 3,086
  6. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,843
  7. CHINESE ACADEMY OF SCIENCES 2,702
  8. ARCELORMITTAL LU 2,124
  9. NSSMC (NIPPON STEEL & SUMITOMO METAL) 2,075
  10. KOBE STEEL JP 1,891