US PATENT SUBCLASS 75 / 570
.~.~.~.~.~.~ Alkali metal compound or Alkaline earth metal 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}
560  DF  .~.~.~.~.~ Treating premelted Iron(Fe) or slag layer thereon by adding solid agent, slag, or flux {9}
570.~.~.~.~.~.~ Alkali metal compound or Alkaline earth metal compound

DEFINITION

Classification: 75/570

Alkali metal compound or Alkaline earth metal compound:

(under subclass 560) Process wherein an Alkali metal compound (e.g., Sodium hydroxide, Sodium carbonate, etc.) or an Alkaline earth metal compound (e.g., Calcium Oxide, Calcium carbonate, etc.) is present in the solid agent, separately prepared slag, or flux.