Full Title

Cleaning or keeping clear the surface of open water; Apparatus therefor (construction of ships or other waterborne vessels B63B, e.g. vessels specially adapted for collecting pollution from open water B63B35/32; in swimming or splash baths or pools E04H4/16) > Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials (; other treatment of water, waste water or sewage C02F; materials for treating liquid pollutants, e.g. oil, gasoline, fat, C09K3/32 ) > Devices for reducing the polluted area without removing the material