Devices for cleaning or keeping clear the surface of open water from

Official title: Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials ({stopping water-borne material in artificial water canals E02B5/085; stopping water-borne material at barrages or weirs E02B8/023}; other treatment of water, waste water or sewage C02F; materials for treating liquid pollutants, e.g. oil, gasoline, fat, C09K3/32 {; separation of oil in sewage conduits E03F5/16})

E02B15/04 (Devices for cleaning or keeping clear the surface of open water from) appears on 1,265 US grants and 738 published applications in this corpus.