Classifying – separating – and assorting solids – Fluid suspension – Liquid
252 61, B03D 1014, B03D 102
Various 1,4-disubstituted-2,3,5,6-tetrahydroxy-1,4-diphosphorinanes, their oxides and sulfides, methods for the production thereof, flame-retarded compositions of matter containing them and froth flotation processes therewith, are disclosed.
patent: 2894016 (1959-07-01), Lanham
patent: 3070619 (1962-12-01), Lanham
patent: 3355017 (1967-11-01), Wystrach
patent: 4855507 (1989-08-01), Robertson et al.
Gallivan James B.
Robertson Allan J.
American Cyanamid Company
Lacey David L.
Lithgow Thomas M.
Van Riet Frank M.
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