US PATENT SUBCLASS 75 / 518
.~.~.~.~.~.~ With compound containing Alkali metal and Oxygen (e.g., Sodium nitrate, Sodium carbonate, 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}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
513  DF  .~.~.~.~.~ In reverberatory furnace (e.g., open-hearth, Siemens-Martin, puddling, etc.) {9}
518.~.~.~.~.~.~ With compound containing Alkali metal and Oxygen (e.g., Sodium nitrate, Sodium carbonate, etc.)

DEFINITION

Classification: 75/518

With compound containing Alkali metal and Oxygen (e.g., Sodium nitrate, Sodium carbonate, etc.):

(under subclass 513) Process wherein a compound containing Alkali metal and Oxygen (e.g. Sodium nitrate, Sodium carbonate, etc.) is present in the reverberatory furnace at any time during the process.