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PCE
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DIFF Subgroup
F28C 3/08

with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with change of state, e.g. absorption, evaporation, condensation

CPC: with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure 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 > with change of state, e.g. absorption, evaporation, condensation

CPC:

Other direct-contact heat-exchange apparatus > the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22) > with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22)

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