F23C 10/32 by controlling the rate of recirculation of particles separated from the flue gases
Introduced: January 2000
Last revised: January 2006
Full Title
Apparatus in which combustion takes place in a fluidised bed of fuel or other particles > Details; Accessories > Control devices specially adapted for fluidised bed combustion apparatus > for controlling the level of the bed or the amount of material in the bed > by controlling the rate of recirculation of particles separated from the flue gases
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- COMBUSTION APPARATUS; COMBUSTION PROCESSES
- Subclass:
- METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR
Filing statistics
IPC F23C 10/32 belongs to the parent subclass F23C, which recorded 19,304 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,668 in 2013 to 1,524 in 2023 (-9%), peaking at 1,986 applications in 2017. 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
Top Applicants
Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,124
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
- NINGBO FOTILE KITCHENWARE COMPANY 1,363
- SIEMENS DE 997
- UNITED TECHNOLOGIES CORPORATION (UTC) US 937
- GE (GENERAL ELECTRIC COMPANY) 898
- VATTI 815
- CHINESE ACADEMY OF SCIENCES 719
- RINNAI COMPANY 708
- MITSUBISHI HITACHI POWER SYSTEMS 670