US PATENT SUBCLASS 75 / 550
.~.~.~.~.~.~.~.~ And adding gaseous Oxygen or inert gas to exhaust gas

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}
528  DF  .~.~.~.~.~ Injecting gas or nonmetalliferous liquid which gasifies into, onto, or through premelted Iron(Fe) or slag layer thereon {5}
548  DF  .~.~.~.~.~.~ Gas contains gaseous Oxygen {4}
549  DF  .~.~.~.~.~.~.~ With treatment of exhaust gas {1}
550.~.~.~.~.~.~.~.~ And adding gaseous Oxygen or inert gas to exhaust gas

DEFINITION

Classification: 75/550

And adding gaseous Oxygen or inert gas to exhaust gas:

(under subclass 549) Process wherein gaseous Oxygen is added with the exhaust gas or wherein an inert gas is added to the exhaust gas.

(1) Note. If the added gaseous Oxygen reacts with the exhaust gas leaving no Oxygen in the altered exhaust gas, proper classification remains with this subclass.