Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work

CPC: Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D)

Full Title

Full titles differ between systems:

IPC:

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work

CPC:

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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B21B 19/02 the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling IPC+CPC Available in IPC and CPC
B21B 19/12 the axes of the rollers being arranged essentially parallel to the axis of the work IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL 2,318
JFE STEEL JP 2,294
POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
NIPPON STEEL CORPORATION JP 1,650
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
SMS GROUP DE 1,472
BAOSHAN IRON & STEEL COMPANY 1,181
SGCC(STATE GRID CORPORATION OF CHINA) 1,079
ANHUI JIANGHUAI AUTOMOBILE 984
HYUNDAI STEEL COMPANY KR 980

Top Applicants (CPC)

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