CPC Subgroup Additional Only
F05D 2220/321 for a special turbine stage
Full Title
Application > in turbines > in gas turbines > for a special turbine stage
Filing statistics
CPC F05D 2220/321 belongs to the parent subclass F05D, which recorded 129,755 patent applications worldwide between 2013 and 2023. Annual filings declined from 11,710 in 2013 to 7,840 in 2023 (-33%), peaking at 14,062 applications in 2016. The most active applicants in class F05 are GE (GENERAL ELECTRIC COMPANY) (12,002 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (8,736 applications) and SAFRAN AIRCRAFT ENGINES (6,804 applications).
Source: EPO PATSTAT, worldwide filings
4 direct subcodes
Child Classifications
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- F05D 2220/3212 the first stage of a turbine
- F05D 2220/3213 an intermediate stage of the turbine
- F05D 2220/3215 the last stage of the turbine
- F05D 2220/3216 for a special compressor stage
Top Applicants
Top 10 applicants by patent filingsfor class F05, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 12,002
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,736
- SAFRAN AIRCRAFT ENGINES FR 6,804
- RAYTHEON TECHNOLOGIES CORPORATION US 4,530
- SIEMENS DE 4,371
- GE (GENERAL ELECTRIC COMPANY) 3,686
- ROLLS-ROYCE GB 3,594
- PRATT & WHITNEY CANADA CORPORATION CA 3,415
- VESTAS DK 3,076
- WOBBEN PROPERTIES DE 2,614