CPC Main Group
F01N 13/00 Exhaust or silencing apparatus characterised by constructional features
Filing statistics
CPC F01N 13/00 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
16 direct subcodes
Child Classifications
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- F01N 13/02 having two or more separate silencers in series
- F01N 13/04 having two or more silencers in parallel, e.g. having interconnections for multi-cylinder engines
- F01N 13/06 specially adapted for star-arrangement of cylinders, e.g. exhaust manifolds
- F01N 13/08 Other arrangements or adaptations of exhaust conduits
- F01N 13/12 specially adapted for submerged exhausting
- F01N 13/14 having thermal insulation
- F01N 13/16 Selection of particular materials
- F01N 13/18 Construction facilitating manufacture, assembly, or disassembly
- F01N 13/20 having flared outlets, e.g. of fish-tail shape
Top Applicants
Top 10 applicants by patent filingsfor 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