US PATENT SUBCLASS 75 / 622
.~.~.~.~.~ Vanadium(V), Niobium(Nb) or Columbium(Cb), or Tantalum(Ta), singly or in combination

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}
585  DF  .~.~.~ Nonferrous {25}
611  DF  .~.~.~.~ Refractory metal, singly or in combination {3}
622.~.~.~.~.~ Vanadium(V), Niobium(Nb) or Columbium(Cb), or Tantalum(Ta), singly or in combination

DEFINITION

Classification: 75/622

Vanadium (V), Niobium (Nb) or Columbium (Cb), or Tantalum (Ta), singly or in combination:

(under subclass 611) Process in which Vanadium (V), Niobium (Nb) or Columbium (Cb), or Tantalum (Ta) is produced or a metal that contains over 50 percent by weight Titanium, Niobium or Columbium, or Tantalum, singly or in combination, is treated.