US PATENT SUBCLASS 75 / 450
.~.~.~.~.~.~ Using plural fluidized bed furnaces

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}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
433  DF  .~.~.~ Iron(Fe) {18}
443  DF  .~.~.~.~ Reducing in gaseous suspension {4}
444  DF  .~.~.~.~.~ Fluidized bed {4}
450.~.~.~.~.~.~ Using plural fluidized bed furnaces

DEFINITION

Classification: 75/450

Using plural fluidized bed furnaces:

(under subclass 444) Process in which the solid material passes from one fluidized bed furnace to another.