CPC Main Group
B21D 19/00 Flanging or other edge treatment, e.g. of tubes (connecting by making use of folds B21D39/00; flaring-out tube ends B21D41/02)
Filing statistics
CPC B21D 19/00 belongs to the parent subclass B21D, which recorded 119,625 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,189 in 2013 to 10,326 in 2023 (+67%), peaking at 14,303 applications in 2020. The most active applicants in class B21 are JFE STEEL (2,667 applications), NIPPON STEEL CORPORATION (2,049 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (1,967 applications).
Source: EPO PATSTAT, worldwide filings
5 direct subcodes
Child Classifications
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- B21D 19/02 by continuously-acting tools moving along the edge (edge-curling B21D19/12)
- B21D 19/08 by single or successive action of pressing tools, e.g. vice jaws
- B21D 19/12 Edge-curling
- B21D 19/16 Reverse flanging of tube ends
Top Applicants
Top 10 applicants by patent filingsfor class B21, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL JP 2,667
- NIPPON STEEL CORPORATION JP 2,049
- POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
- SMS GROUP DE 1,538
- JFE STEEL 1,150
- ARCELORMITTAL LU 1,142
- BAOSHAN IRON & STEEL COMPANY 821
- HYUNDAI STEEL COMPANY KR 808
- THYSSENKRUPP STEEL EUROPE DE 660