Arrangements of installations for treating waste water, sewage, , or for preventing environmental pollution not otherwise provided for; ( soil-water discharges B63B29/16; )

Filing statistics

CPC B63J 4/00 belongs to the parent subclass B63J, which recorded 11,295 patent applications worldwide between 2013 and 2023. Annual filings grew from 981 in 2013 to 1,100 in 2023 (+12%), peaking at 1,296 applications in 2022. The most active applicants in class B63 are SAMSUNG HEAVY INDUSTRIES (4,830 applications), DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY (4,093 applications) and HYUNDAI HEAVY INDUSTRIES COMPANY (2,639 applications).

Source: EPO PATSTAT, worldwide filings