Apparatus in which the main direction of flow follows a flat spiral

Filing statistics

CPC B04C 1/00 belongs to the parent subclass B04C, which recorded 8,402 patent applications worldwide between 2013 and 2023. Annual filings declined from 621 in 2013 to 475 in 2023 (-24%), peaking at 1,074 applications in 2017. The most active applicants in class B04 are ALFA LAVAL (576 applications), GEA MECHANICAL EQUIPMENT (304 applications) and DYSON (221 applications).

Source: EPO PATSTAT, worldwide filings