Heat-exchange apparatus using a fluidised bed

Filing statistics

CPC F28D 13/00 belongs to the parent subclass F28D, which recorded 92,000 patent applications worldwide between 2013 and 2023. Annual filings grew from 7,164 in 2013 to 7,786 in 2023 (+9%), peaking at 9,759 applications in 2020. The most active applicants in class F28 are VALEO SYSTEMES THERMIQUES (1,945 applications), MITSUBISHI ELECTRIC CORPORATION (1,518 applications) and MAHLE INTERNATIONAL (1,120 applications).

Source: EPO PATSTAT, worldwide filings