US PATENT SUBCLASS 75 / 515
.~.~.~.~.~.~ With melting Iron(Fe) in shaft furnace

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}
515.~.~.~.~.~.~ With melting Iron(Fe) in shaft furnace

DEFINITION

Classification: 75/515

With melting Iron (Fe) in shaft furnace:

(under subclass 513) Process in which the melting of solid metal that contains over 50 percent by weight Iron in a shaft furnace is combined with a process step taking place in a reverberatory furnace.

(1) Note. Most patents in this subclass are drawn to a process of melting metal in a shaft furnace (e.g., cupola, etc.), and passing the molten metal to a reverberatory

furnace for treatment.