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CPC Main Group Additional Only
F01N 2470/00

Structure or shape of exhaust gas passages, pipes or tubes

Filing statistics

CPC F01N 2470/00 belongs to the parent subclass F01N, which recorded 80,748 patent applications worldwide between 2013 and 2023. Annual filings declined from 7,362 in 2013 to 4,058 in 2023 (-45%), peaking at 9,617 applications in 2017. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (9,989 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (8,110 applications) and SAFRAN AIRCRAFT ENGINES (6,248 applications).

Source: EPO PATSTAT, worldwide filings

14 direct subcodes

Child Classifications

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  • F01N 2470/06 Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
  • F01N 2470/08 Exhaust gas passages being formed between the walls of an outer shell and an inner chamber
  • F01N 2470/10 Tubes having non-circular cross section
  • F01N 2470/12 Tubes being corrugated
  • F01N 2470/14 Plurality of outlet tubes, e.g. in parallel or with different length
  • F01N 2470/16 Plurality of inlet tubes, e.g. discharging into different chambers
  • F01N 2470/18 the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
  • F01N 2470/20 Dimensional characteristics of tubes, e.g. length, diameter
  • F01N 2470/22 Inlet and outlet tubes being positioned on the same side of the apparatus
  • F01N 2470/24 Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
  • F01N 2470/26 Tubes being formed by extrusion, drawing or rolling
  • F01N 2470/28 Tubes being formed by moulding or casting x
  • F01N 2470/30 Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow

Top Applicants

Top 10 applicants by patent filingsfor 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