US PATENT SUBCLASS 75 / 473
.~.~.~.~ Reduction in closed retort (e.g., Hoganas process, etc.)

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}
473.~.~.~.~ Reduction in closed retort (e.g., Hoganas process, etc.)

DEFINITION

Classification: 75/473

Reduction in closed retort (e.g., Hoganas process, etc.):

(under subclass 433) Process wherein no substance is added to the batch during the reduction (e.g., heating a closed mixture of ore and Carbon (C), etc.).

(1) Note. The closed retort may be a container, as in the Hoganas process.