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CPC Subgroup
F23K 5/02

Liquid fuel

Full Title

Feeding or distributing other fuel to combustion apparatus > Liquid fuel

Filing statistics

CPC F23K 5/02 belongs to the parent subclass F23K, which recorded 9,121 patent applications worldwide between 2013 and 2023. Annual filings grew from 732 in 2013 to 809 in 2023 (+11%), peaking at 1,000 applications in 2017. The most active applicants in class F23 are GE (GENERAL ELECTRIC COMPANY) (2,581 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (1,180 applications) and SIEMENS (1,157 applications).

Source: EPO PATSTAT, worldwide filings

4 direct subcodes

Child Classifications

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  • F23K 5/04 Feeding or distributing systems using pumps (from a central source to a plurality of burners F23K5/06)
  • F23K 5/06 from a central source to a plurality of burners

Top Applicants

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

  1. GE (GENERAL ELECTRIC COMPANY) US 2,581
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
  3. SIEMENS DE 1,157
  4. GE (GENERAL ELECTRIC COMPANY) 994
  5. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
  6. MITSUBISHI HEAVY INDUSTRIES JP 701
  7. MITSUBISHI HITACHI POWER SYSTEMS JP 695
  8. RAYTHEON TECHNOLOGIES CORPORATION US 587
  9. NINGBO FOTILE KITCHENWARE COMPANY 543
  10. GENERAL ELECTRIC TECHNOLOGY CH 490