Patent Classification Explorer PCE

DIFF Main Group

C22B 15/00

Obtaining copper

Introduced: September 1968

Of 8 combined children, 0 exist in both systems.

4 codes are CPC-only extensions, 4 exist only in IPC.

Child Classifications

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C22B 15/0002 +2 CPC CPC only CPC only
C22B 15/0026 +4 CPC CPC only CPC only
C22B 15/0063 +2 CPC CPC only CPC only
C22B 15/0095 +1 CPC CPC only CPC only
C22B 15/02 in blast furnaces IPC only IPC only
C22B 15/04 in reverberatory furnaces IPC only IPC only
C22B 15/06 in converters IPC only IPC only
C22B 15/14 Refining IPC only IPC only

Top Applicants

Top Applicants (IPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

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

Top Applicants (CPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL JP 7,620
NIPPON STEEL CORPORATION JP 5,769
POSCO (POHANG IRON AND STEEL COMPANY) KR 4,523
JFE STEEL 3,080
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,999
ARCELORMITTAL LU 2,962
CENTRAL SOUTH UNIVERSITY 2,431
KOBE STEEL JP 2,100
CHINESE ACADEMY OF SCIENCES 2,052
MITSUBISHI MATERIALS CORPORATION JP 1,405