F24F 3/16 by purification, e.g. by filtering; by sterilisation; by ozonisation
Introduced: September 1968
Last revised: January 2021
Full Title
Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems > characterised by the treatment of the air otherwise than by heating and cooling > by purification, e.g. by filtering; by sterilisation; by ozonisation
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- HEATING; RANGES; VENTILATING
- Subclass:
- AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
Filing statistics
IPC F24F 3/16 belongs to the parent subclass F24F, which recorded 427,113 patent applications worldwide between 2013 and 2023. Annual filings grew from 18,421 in 2013 to 43,974 in 2023 (+139%), peaking at 53,956 applications in 2020. The most active applicants in class F24 are MIDEA (21,834 applications), GREE ELECTRIC APPLIANCES (21,535 applications) and GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY (20,870 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
2 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- F24F 3/163 Clean air work stations, i.e. selected areas within a space to which filtered air is passed
- F24F 3/167 Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed
Top Applicants
Top 10 applicants by patent filingsfor class F24, 2013–2023, worldwide · Source: EPO PATSTAT
- MIDEA 21,834
- GREE ELECTRIC APPLIANCES 21,535
- GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY 20,870
- QINGDAO HAIER AIR CONDITIONER COMPANY 15,443
- HAIER SMART HOME 15,442
- QINGDAO HAIER AIR CONDITIONER ELECTRIC COMPANY 10,008
- AUX AIR CONDITIONING COMPANY 7,723
- NINGBO AUX ELECTRIC COMPANY 7,499
- NINGBO FOTILE KITCHENWARE COMPANY 6,712
- LG ELECTRONICS KR 6,441