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DIFF Subgroup
B21B 1/08

for rolling work of special cross-section, e.g. angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H8/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: for rolling work of special cross-section, e.g. angle steel

CPC: for rolling work of special cross-section, e.g. angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H8/00)

Full Title

Full titles differ between systems:

IPC:

Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations > for rolling work of special cross-section, e.g. angle steel

CPC:

Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section (B21B17/00 - B21B23/00 take precedence; with respect to composition of material to be rolled B21B3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00; metal-rolling stands as units B21B13/00; continuous casting into moulds having walls formed by moving rolls B22D11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations > for rolling work of special cross-section, e.g. angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H8/00)

Of 13 combined children, 10 exist in both systems.

3 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • B21B 1/0805 CPC only CPC only
  • B21B 1/0815 CPC only CPC only
  • B21B 1/082 Piling sections having lateral edges specially adapted for interlocking with each other in order to build a wall since 2006 IPC+CPC Available in IPC and CPC
  • B21B 1/09 L-sections since 2006 IPC+CPC Available in IPC and CPC
  • B21B 1/092 T-sections since 2006 IPC+CPC Available in IPC and CPC
  • B21B 1/095 U-or channel sections since 2006 IPC+CPC Available in IPC and CPC
  • B21B 1/098 Z-sections since 2006 IPC+CPC Available in IPC and CPC
  • B21B 1/10 in a single two-high or universal rolling mill IPC+CPC Available in IPC and CPC
  • B21B 1/12 in a continuous process IPC+CPC Available in IPC and CPC
  • B21B 1/14 in a non-continuous process IPC+CPC Available in IPC and CPC
  • B21B 2001/081 2nd only CPC only CPC only

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

  1. JFE STEEL JP 2,667
  2. NIPPON STEEL CORPORATION JP 2,049
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
  4. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
  5. SMS GROUP DE 1,538
  6. JFE STEEL 1,150
  7. ARCELORMITTAL LU 1,142
  8. BAOSHAN IRON & STEEL COMPANY 821
  9. HYUNDAI STEEL COMPANY KR 808
  10. THYSSENKRUPP STEEL EUROPE DE 660