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IPC Main Group
F23D 1/00

Burners for combustion of pulverulent fuel

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
BURNERS

Filing statistics

IPC F23D 1/00 belongs to the parent subclass F23D, which recorded 48,008 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,116 in 2013 to 4,648 in 2023 (+49%), peaking at 5,460 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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  • F23D 1/02 Vortex burners, e.g. for cyclone-type combustion apparatus
  • F23D 1/04 Burners producing cylindrical flames without centrifugal action
  • F23D 1/06 Burners producing sheet flames

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