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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
B22C 1/02

characterised by additives for special purposes, e.g. indicators, breakdown additives

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds > characterised by additives for special purposes, e.g. indicators, breakdown additives

CPC:

Compositions of refractory mould or core materials; Grain structures thereof (refractory materials in general C04B35/00); Chemical or physical features in the formation or manufacture of moulds > characterised by additives for special purposes, e.g. indicators, breakdown additives

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • B22C 1/08 for decreasing shrinkage of the mould, e.g. for investment casting IPC+CPC Available in IPC and CPC
  • B22C 1/10 for influencing the hardening tendency of the mould material (influencing the hardening tendency of the binding agent only B22C1/16) IPC+CPC Available in IPC and CPC
  • B22C 1/12 for manufacturing permanent moulds or cores IPC+CPC Available in IPC and CPC
  • B22C 1/14 for separating the pattern from the mould IPC+CPC Available in 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