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IPC Main Group
F23H 1/00

Grates with solid bars

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
GRATES; CLEANING OR RAKING GRATES

Filing statistics

IPC F23H 1/00 belongs to the parent subclass F23H, which recorded 2,855 patent applications worldwide between 2013 and 2023. Annual filings grew from 165 in 2013 to 226 in 2023 (+37%), peaking at 388 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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  • F23H 1/02 having provision for air supply or air preheating, e.g. air-supply or blast fittings which form part of the grate structure or serve as supports
  • F23H 1/04 having a variable burning surface
  • F23H 1/06 having bars at different levels
  • F23H 1/08 Vertical grates

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