using means for regenerating the filters, e.g. by burning trapped particles

Introduced: January 2000

Full Title

Full titles differ between systems:

IPC:

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust > for cooling, or for removing solid constituents of, exhaust > by means of filters > using means for regenerating the filters, e.g. by burning trapped particles

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 cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N3/01 ) > by means of filters > using means for regenerating the filters, e.g. by burning trapped particles

CPC subdivides this area 4x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2000.

Child Classifications

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F01N 3/0231 CPC only CPC only
F01N 3/0232 CPC only CPC only
F01N 3/0233 CPC only CPC only
F01N 3/0234 CPC only CPC only
F01N 3/0235 CPC only CPC only
F01N 3/0236 CPC only CPC only
F01N 3/0237 CPC only CPC only
F01N 3/0238 CPC only CPC only
F01N 3/025 using fuel burner or by adding fuel to exhaust since 2000 +1 CPC IPC+CPC Available in IPC and CPC
F01N 3/027 using electric or magnetic heating means since 2000 +1 CPC IPC+CPC Available in IPC and CPC
F01N 3/029 by adding non-fuel substances to exhaust since 2000 +1 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

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