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PCE
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DIFF Main Group
F28B 3/00

Condensers in which the steam or vapour comes into direct contact with the cooling medium

Introduced: September 1968

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F28B 3/02 by providing a flowing coating of cooling liquid on the condensing surface IPC+CPC Available in IPC and CPC
  • F28B 3/04 by injecting cooling liquid into the steam or vapour (F28B3/08 takes precedence) IPC+CPC Available in IPC and CPC
  • F28B 3/06 by injecting the steam or vapour into the cooling liquid (F28B3/08 takes precedence) IPC+CPC Available in IPC and CPC
  • F28B 3/08 with rotatable members 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