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IPC Main Group
F23B 40/00

Combustion apparatus with driven means for feeding fuel into the combustion chamber

Introduced: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL

Filing statistics

IPC F23B 40/00 belongs to the parent subclass F23B, which recorded 9,943 patent applications worldwide between 2013 and 2023. Annual filings declined from 782 in 2013 to 671 in 2023 (-14%), peaking at 1,128 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

3 direct subcodes

Child Classifications

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  • F23B 40/02 the fuel being fed by scattering over the fuel-supporting surface
  • F23B 40/04 the fuel being fed from below through an opening in the fuel-supporting surface

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