CPC Main Group
F01C 21/00 Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
Filing statistics
CPC F01C 21/00 belongs to the parent subclass F01C, which recorded 11,139 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,330 in 2013 to 549 in 2023 (-59%), peaking at 1,372 applications in 2016. 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
12 direct subcodes
Child Classifications
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- F01C 21/02 Arrangements of bearings (bearing constructions F16C)
- F01C 21/04 Lubrication (of machines or engines in general F01M)
- F01C 21/06 Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
- F01C 21/08 Rotary pistons (reciprocating pistons in general F16J)
- F01C 21/10 Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
- F01C 21/18 Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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