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DIFF Subgroup
F01K 23/10

with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with exhaust fluid of one cycle heating the fluid in another cycle

CPC: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids > the engine cycles being thermally coupled > combustion heat from one cycle heating the fluid in another cycle > with exhaust fluid of one cycle heating the fluid in another cycle

CPC:

Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids > the engine cycles being thermally coupled > combustion heat from one cycle heating the fluid in another cycle > with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.

Child Classifications

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Top Applicants

Top Applicants (IPC)

Class F01,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 8,496
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
  3. SAFRAN AIRCRAFT ENGINES FR 5,503
  4. TOYOTA MOTOR CORPORATION 4,556
  5. SIEMENS DE 3,992
  6. HYUNDAI MOTOR COMPANY KR 3,929
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,534
  8. FORD GLOBAL TECHNOLOGIES US 3,407
  9. TOYOTA MOTOR CORPORATION JP 3,042
  10. WEICHAI POWER COMPANY 2,888

Top Applicants (CPC)

Class F01,2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 9,989
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
  3. SAFRAN AIRCRAFT ENGINES FR 6,248
  4. HYUNDAI MOTOR COMPANY KR 4,530
  5. SIEMENS DE 4,461
  6. FORD GLOBAL TECHNOLOGIES US 4,029
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,947
  8. TOYOTA MOTOR CORPORATION JP 3,734
  9. GE (GENERAL ELECTRIC COMPANY) 3,415
  10. SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063