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DIFF Subgroup
B22D 11/118

by circulating the metal under, over or around weirs (B22D11/119 takes precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: by circulating the metal under, over or around weirs

CPC: by circulating the metal under, over or around weirs (B22D11/119 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Continuous casting of metals, i.e. casting in indefinite lengths > Supplying or treating molten metal > Treating the molten metal > Refining the metal > by circulating the metal under, over or around weirs

CPC:

Continuous casting of metals, i.e. casting in indefinite lengths (metal drawing, metal extruding B21C) > Supplying or treating molten metal (B22D41/00 takes precedence) > Treating the molten metal > Refining the metal > by circulating the metal under, over or around weirs (B22D11/119 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class B22,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 1,719
  2. CHINESE ACADEMY OF SCIENCES 1,489
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 1,248
  4. TOYOTA MOTOR CORPORATION 1,043
  5. SIEMENS DE 1,028
  6. CENTRAL SOUTH UNIVERSITY 959
  7. HEWLETT-PACKARD DEVELOPMENT COMPANY US 891
  8. UNITED TECHNOLOGIES CORPORATION (UTC) US 786
  9. UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING 769
  10. JFE STEEL JP 761

Top Applicants (CPC)

Class B22,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,157
  2. HEWLETT-PACKARD DEVELOPMENT COMPANY US 1,633
  3. SIEMENS DE 1,267
  4. POSCO (POHANG IRON AND STEEL COMPANY) KR 1,124
  5. CHINESE ACADEMY OF SCIENCES 1,040
  6. UNITED TECHNOLOGIES CORPORATION (UTC) US 1,015
  7. JFE STEEL JP 884
  8. CENTRAL SOUTH UNIVERSITY 810
  9. HITACHI METALS JP 641
  10. SINTOKOGIO JP 624