B21D 26/033 Deforming tubular bodies (corrugating tubes by applying fluid pressure B21D15/03, B21D15/10)
Full Title
Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces (stamping using resilient pads B21D22/10) > by applying fluid pressure > Deforming tubular bodies (corrugating tubes by applying fluid pressure B21D15/03, B21D15/10)
Filing statistics
CPC B21D 26/033 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
9 direct subcodes
Child Classifications
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- B21D 26/035 including an additional treatment performed by fluid pressure, e.g. perforating
- B21D 26/037 Forming branched tubes
- B21D 26/039 Means for controlling the clamping or opening of the moulds
- B21D 26/041 Means for controlling fluid parameters, e.g. pressure or temperature
- B21D 26/043 Means for controlling the axial pusher
- B21D 26/045 Closing or sealing means
- B21D 26/047 Mould construction (B21D26/037 - B21D26/045 take precedence)
- B21D 26/049 Deforming bodies having a closed end
- B21D 26/051 Deforming double-walled bodies
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