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IPC Main Group
F24D 1/00

Steam 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

4 direct subcodes

Child Classifications

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  • F24D 1/02 operating with live steam
  • F24D 1/04 operating with exhaust steam
  • F24D 1/06 operating with superheated steam
  • F24D 1/08 Feed-line arrangements, e.g. providing for one-pipe system

Top Applicants

Top 10 applicants by patent filingsfor class F24, 2013–2023, worldwide · Source: EPO PATSTAT

  1. MIDEA 21,834
  2. GREE ELECTRIC APPLIANCES 21,535
  3. GUANGDONG MIDEA REFRIGERATION EQUIPMENT COMPANY 20,870
  4. QINGDAO HAIER AIR CONDITIONER COMPANY 15,443
  5. HAIER SMART HOME 15,442
  6. QINGDAO HAIER AIR CONDITIONER ELECTRIC COMPANY 10,008
  7. AUX AIR CONDITIONING COMPANY 7,723
  8. NINGBO AUX ELECTRIC COMPANY 7,499
  9. NINGBO FOTILE KITCHENWARE COMPANY 6,712
  10. LG ELECTRONICS KR 6,441