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CPC Subgroup
F23R 3/18

Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants

Full Title

Continuous combustion chambers using liquid or gaseous fuel > characterised by the air-flow or gas-flow configuration (reverse- flow combustion chambers F23R3/54; cyclone or vortex type combustion chambers F23R3/58) > with devices inside the flame tube or the combustion chamber to influence the air or gas flow > Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants

3 direct subcodes

Child Classifications

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  • F23R 3/20 incorporating fuel injection means
  • F23R 3/22 movable, e.g. to an inoperative position; adjustable, e.g. self-adjusting
  • F23R 3/24 of the fluid-screen type

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