US PATENT SUBCLASS 75 / 750
.~.~.~ By sifting

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
746  DF  .~ Consolidating metalliferous material (e.g., ore, tailings, flue dust, fluxes, etc.) by agglomerating, compacting, or heat treating; preparatory process therefor; or treating consolidated material therefrom {5}
749  DF  .~.~ With physical separation or classification of solids {1}
750.~.~.~ By sifting

DEFINITION

Classification: 75/750

By sifting:

(under subclass 749) Process that includes a sifting (e.g., screening, etc.) operation to separate or classify solid material.