US PATENT SUBCLASS 75 / 516
.~.~.~.~.~.~ Using gaseous Oxygen in a higher concentration than in ambient air


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



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}
516.~.~.~.~.~.~ Using gaseous Oxygen in a higher concentration than in ambient air


DEFINITION

Classification: 75/516

Using gaseous Oxygen in a higher concentration than in ambient air:

(under subclass 513) Process which employs a gas which has a higher concentration of Oxygen than that of ambient air for any purpose.

(1) Note. The higher concentration of Oxygen may be employed to burn fuel in the furnace or it may be injected separately onto molten metal that contains over 50 percent by weight Iron (Fe) by a lance extending through the roof of the reverberatory furnace.