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PCE
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DIFF Subgroup
F01N 3/30

Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22)

Introduced: January 1980

Title

Titles differ between systems:

IPC: Arrangements for supply of additional air

CPC: Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22)

Full Title

Full titles differ between systems:

IPC:

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust > for rendering innocuous > by thermal or catalytic conversion of noxious components of exhaust > characterised by constructional aspects of converting apparatus > Arrangements for supply of additional air

CPC:

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) > for rendering innocuous (using electric or electrostatic separators F01N3/01; chemical aspects B01D53/92) > by thermal or catalytic conversion of noxious components of exhaust > characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035) > Arrangements for supply of additional air (control, e.g. using by-passes or variable air pump drives, F01N3/22)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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  • F01N 3/303 CPC only CPC only
  • F01N 3/306 CPC only CPC only
  • F01N 3/34 using air conduits or jet air pumps, e.g. near the engine exhaust port since 1980 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