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DIFF Subgroup
B22D 41/40

Means for pressing the plates together

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like > Closures > sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings > Means for pressing the plates together

CPC:

Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like (B22D39/00, B22D43/00 take precedence) > Closures > sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings > Means for pressing the plates together

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