(under subclass 27) Processes which include chemically forming a compound having the sulfate (SO[supscrpt]4[end supscrpt]2[supscrpt]-[end supscrpt]) radical.
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36, for a process of forming a similar metal compound which includes the step of forming a sulfate as well as the steps of leaching or dissolution and causing a substance to become insoluble in, or precipitate out of a liquid or slurry.
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75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,
110, and 115+ for a process of obtaining a pure elemental metal which includes the step of sulfating.
