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IPC Main Group
B22D 27/00

Treating the metal in the mould while it is molten or ductile

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
CASTING; POWDER METALLURGY
Subclass:
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES

7 direct subcodes

Child Classifications

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  • B22D 27/02 Use of electric or magnetic effects
  • B22D 27/08 Shaking, vibrating, or turning of moulds
  • B22D 27/15 by using vacuum
  • B22D 27/18 Measures for using chemical processes for influencing the surface composition of castings, e.g. for increasing resistance to acid attack
  • B22D 27/2 Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor

Top Applicants

Top 10 applicants by patent filingsfor 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