IPC Main Group
C22C 11/00 Alloys based on lead
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- Subclass:
- ALLOYS
4 direct subcodes
Child Classifications
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- C22C 11/02 with an alkali or an alkaline earth metal as the next major constituent
- C22C 11/04 with copper as the next major constituent
- C22C 11/06 with tin as the next major constituent
- C22C 11/08 with antimony or bismuth as the next major constituent
Top Applicants
Top 10 applicants by patent filingsfor 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