1
Norbert G Lange: Apparatus for multi-phase fluid systems. Hooker Chemicals & Plastics, Peter F Casella, William J Crossetta Jr, Arthur S Cookfair, May 23, 1978: US04090530 (35 worldwide citation)

An apparatus is provided wherein, in a static condition a lower phase liquid is covered by an upper phase liquid which is non-miscible with the lower phase liquid. In operation, the upper phase liquid is removed from a selected area of the lower phase liquid by raising the upper phase liquid to pass ...


2
Norbert G Lange: Entrance duct with weir. Hooker Chemicals & Plastics Corporation, Peter F Casella, William J Crossetta Jr, October 26, 1976: US03987816 (11 worldwide citation)

A tank is provided in which a lower solution is covered by an upper solution which is non-miscible with the lower solution. In the operating condition the apparatus automatically uncovers a small area of lower solution by raising the level of lower solution in that area and having the upper solution ...