Downward filtration, the container having distribution or collection headers or pervious conduits

Full Title

Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (B01D27/02 takes precedence) > with the filter bed stationary during the filtration > the filtering material being provided in an open container > Downward filtration, the container having distribution or collection headers or pervious conduits