US PATENT SUBCLASS 75 / 520
.~.~.~.~.~.~ With Alkaline earth metal or Magnesium(Mg) containing compound

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}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
513  DF  .~.~.~.~.~ In reverberatory furnace (e.g., open-hearth, Siemens-Martin, puddling, etc.) {9}
520.~.~.~.~.~.~ With Alkaline earth metal or Magnesium(Mg) containing compound

DEFINITION

Classification: 75/520

With Alkaline earth metal or Magnesium (Mg) containing compound:

(under subclass 513) Process wherein an Alkaline earth metal compound or a Magnesium (Mg) compound is present in the reverberatory furnace at any time during the process.

(1) Note. The presence of an Alkaline furnace lining (e.g., magnesia brick, etc.) will be disregarded for purposes of this subclass.