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DIFF Subgroup
F28C 3/06

the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the heat-exchange media being a liquid and a gas or vapour

CPC: the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22)

Full Title

Full titles differ between systems:

IPC:

Other direct-contact heat-exchange apparatus > the heat-exchange media being a liquid and a gas or vapour

CPC:

Other direct-contact heat-exchange apparatus > the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22)

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F28C 3/08 with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22) IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO SYSTEMES THERMIQUES FR 1,902
  2. MITSUBISHI ELECTRIC CORPORATION JP 1,327
  3. GREE ELECTRIC APPLIANCES 1,152
  4. MAHLE INTERNATIONAL DE 999
  5. ALFA LAVAL SE 960
  6. HANON SYSTEMS KR 917
  7. DENSO CORPORATION 905
  8. DENSO CORPORATION JP 802
  9. CHINESE ACADEMY OF SCIENCES 787
  10. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762

Top Applicants (CPC)

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO SYSTEMES THERMIQUES FR 1,945
  2. MITSUBISHI ELECTRIC CORPORATION JP 1,518
  3. MAHLE INTERNATIONAL DE 1,120
  4. ALFA LAVAL SE 1,085
  5. HANON SYSTEMS KR 939
  6. DENSO CORPORATION JP 900
  7. LG ELECTRONICS KR 861
  8. HAMILTON SUNDSTRAND US 795
  9. DAIKIN INDUSTRIES JP 608
  10. DENSO CORPORATION 537