Concentration of sulphur
United States Patent 1697402

Inventors:
Hoit, Nutter Edward
Littleford, John W.
Publication Date:
01/01/1929
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Assignee:
Minerals, Separation North US.
Primary Class:
241/3
Other Classes:
209/11, 209/166, 23/308S, 241/23, 241/20
International Classes:
C01B17/033; C01B17/00