IPC Main Group
F24D 3/00 Hot-water central heating systems
Introduced: September 1968
Last revised: January 2022
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- HEATING; RANGES; VENTILATING
- Subclass:
- DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
6 direct subcodes
Child Classifications
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- F24D 3/02 with forced circulation, e.g. by pumps
- F24D 3/04 with the water under high pressure
- F24D 3/08 in combination with systems for domestic hot-water supply
- F24D 3/1 Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
- F24D 3/12 Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D 3/18 using heat pumps
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