US PATENT SUBCLASS 75 / 756
.~.~.~.~ Using multi-layers

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}
755  DF  .~.~.~ On moving grate, moving pallet, or endless belt {3}
756.~.~.~.~ Using multi-layers

DEFINITION

Classification: 75/756

Using multi-layers:

(under subclass 755) Process wherein the material undergoing heat treatment is placed on the grate, pallet, or belt in more than one layer defined by particle characteristics or interspersed with a layer of diverse material (e.g., fuel, etc.).

(1) Note. The multi-layers do not refer to coatings on a

pellet, briquette, or consolidated material but refer solely to the layering of materials undergoing treatment on the moving apparatus.