Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
F01K 7/34

the engines being of extraction or non-condensing type; Use of steam for feed-water heating (feed-water heaters in general F22D)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the engines being of extraction or non-condensing type; Use of steam for feed-water heating

CPC: the engines being of extraction or non-condensing type; Use of steam for feed-water heating (feed-water heaters in general F22D)

Full Title

Full titles differ between systems:

IPC:

Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating > the engines being of extraction or non-condensing type; Use of steam for feed-water heating

CPC:

Steam engine plants characterised by the use of specific types of engine (F01K3/02 takes precedence); Plants or engines characterised by their use of special steam systems, cycles or processes (reciprocating-piston engines using uniflow principle F01B17/04); Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating > the engines being of extraction or non-condensing type; Use of steam for feed-water heating (feed-water heaters in general F22D)

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

Navigate with arrow keys, Enter to open

  • F01K 7/345 CPC only CPC only
  • F01K 7/36 the engines being of positive-displacement type IPC+CPC Available in IPC and CPC
  • F01K 7/38 the engines being of turbine type IPC+CPC Available in IPC and CPC
  • F01K 7/40 Use of two or more feed-water heaters in series IPC+CPC Available in IPC and CPC
  • F01K 7/42 Use of desuperheaters for feed-water heating IPC+CPC Available in IPC and CPC
  • F01K 7/44 Use of steam for feed-water heating and another purpose IPC+CPC Available in IPC and CPC

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