CPC Subgroup
F25B 41/31 Expansion valves
Full Title
Fluid-circulation arrangements > Expansion means; Dispositions thereof > Expansion valves
Filing statistics
CPC F25B 41/31 belongs to the parent subclass F25B, which recorded 121,123 patent applications worldwide between 2013 and 2023. Annual filings grew from 7,227 in 2013 to 10,966 in 2023 (+52%), peaking at 13,018 applications in 2018. The most active applicants in class F25 are LG ELECTRONICS (9,415 applications), HAIER SMART HOME (8,015 applications) and MITSUBISHI ELECTRIC CORPORATION (5,758 applications).
Source: EPO PATSTAT, worldwide filings
6 direct subcodes
Child Classifications
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- F25B 41/315 actuated by floats
- F25B 41/32 having flow rate limiting means other than the valve member, e.g. having bypass orifices in the valve body
- F25B 41/325 having two or more valve members
- F25B 41/33 with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
- F25B 41/34 with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B 41/36 with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant
Top Applicants
Top 10 applicants by patent filingsfor class F25, 2013–2023, worldwide · Source: EPO PATSTAT
- LG ELECTRONICS KR 9,415
- HAIER SMART HOME 8,015
- MITSUBISHI ELECTRIC CORPORATION JP 5,758
- BSH (BOSCH UND SIEMENS HAUSGERAETE) DE 3,827
- MIDEA 3,769
- GREE ELECTRIC APPLIANCES 3,417
- HAIER SMART HOME CN 3,403
- SAMSUNG ELECTRONICS COMPANY KR 3,329
- DAIKIN INDUSTRIES JP 2,908
- HEFEI MIDEA REFRIGERATOR COMPANY 2,186