DIFF Subgroup
C22B 60/02 Obtaining thorium, uranium, or other actinides
Introduced: July 1974
Title
Titles differ between systems:
IPC: Obtaining thorium, uranium or other actinides
CPC: Obtaining thorium, uranium, or other actinides
Full Title
Full titles differ between systems:
IPC:
Obtaining metals of atomic number 87 or higher, i.e. radioactive metals > Obtaining thorium, uranium or other actinides
CPC:
Obtaining metals of atomic number 87 or higher, i.e. radioactive metals > Obtaining thorium, uranium, or other actinides
CPC subdivides this area 4x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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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