US PATENT SUBCLASS 75 / 760
.~.~.~ In shaft furnace or multi-hearth furnace

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}
751  DF  .~.~ With heat treatment (e.g., calcinating, fusing, indurating, roasting, sintering, vaporizing, etc.) {8}
760.~.~.~ In shaft furnace or multi-hearth furnace {1}
761  DF  .~.~.~.~> Sintering

DEFINITION

Classification: 75/760

In shaft furnace or multi-hearth furnace:

(under subclass 751) Process wherein the consolidated metalliferous material or the material undergoing consolidation is heat treated in an upright cylindrical furnace known as a shaft furnace or in any furnace containing multiple hearths.