Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00; remelting ferrous metals C22B)

Filing statistics

CPC C21C 7/00 belongs to the parent subclass C21C, which recorded 24,446 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,016 in 2013 to 3,052 in 2023 (+200%), peaking at 3,180 applications in 2022. The most active applicants in class C21 are JFE STEEL (8,270 applications), NIPPON STEEL CORPORATION (5,222 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (4,824 applications).

Source: EPO PATSTAT, worldwide filings