US PATENT SUBCLASS 204 / 247.3
.~.~.~.~ Refractory hard material (RHM) containing electrode

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
242  DF  .~.~ Cells {10}
243.1  DF  .~.~.~ Fused bath {6}
247.3.~.~.~.~ Refractory hard material (RHM) containing electrode

DEFINITION

Classification: 204/247.3

Refractory hard material (RHM) containing electrode:

(under subclass 243.1) Apparatus having at least one electrode element containing a material which (a) poses significant resistance to corrosion or wear at high temperatures, (b) provides a surface which is wettable by most molten metals, and (c) conducts electrical current (e.g., electrode containing a boride, carbide, or nitride of niobium, titanium, or zirconium, etc.).