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IPC Main Group
F23N 1/00

Regulating fuel supply

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
REGULATING OR CONTROLLING COMBUSTION

Filing statistics

IPC F23N 1/00 belongs to the parent subclass F23N, which recorded 15,400 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,304 in 2013 to 1,445 in 2023 (+11%), peaking at 1,624 applications in 2020. The most active applicants in class F23 are GE (GENERAL ELECTRIC COMPANY) (2,124 applications), XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY (1,369 applications) and NINGBO FOTILE KITCHENWARE COMPANY (1,363 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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  • F23N 1/02 conjointly with air supply
  • F23N 1/04 conjointly with air supply and with draught
  • F23N 1/06 conjointly with draught

Top Applicants

Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,124
  2. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
  3. NINGBO FOTILE KITCHENWARE COMPANY 1,363
  4. SIEMENS DE 997
  5. UNITED TECHNOLOGIES CORPORATION (UTC) US 937
  6. GE (GENERAL ELECTRIC COMPANY) 898
  7. VATTI 815
  8. CHINESE ACADEMY OF SCIENCES 719
  9. RINNAI COMPANY 708
  10. MITSUBISHI HITACHI POWER SYSTEMS 670