IPC Subgroup
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
Related Keywords
sterilisation in AIR -conditioning systemsFILTER(S) in air conditioningair-conditioning including OZONISINGair-conditioning including PURIFICATIONair-conditioning including STERILISING
2 direct subcodes
Child Classifications
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- 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