US PATENT SUBCLASS 75 / 581
.~.~.~.~.~.~ Melting scrap

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}
571  DF  .~.~.~.~.~ Melting solid Iron(Fe) {4}
581.~.~.~.~.~.~ Melting scrap

DEFINITION

Classification: 75/581

Melting scrap:

(under subclass 571) Process wherein the solid Iron (Fe) melted is the waste from manufacturing or is obtained from articles which are no longer useful as such.

(1) Note. The term "scrap" in a patent will make placement in this subclass proper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

433, for a process of preheating scrap Iron to facilitate later melting without actually melting the scrap Iron.