with several individually-movable grate surfaces

Filing statistics

CPC F23H 11/08 belongs to the parent subclass F23H, which recorded 1,339 patent applications worldwide between 2013 and 2023. Annual filings grew from 99 in 2013 to 110 in 2023 (+11%), peaking at 196 applications in 2020. 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