US PATENT SUBCLASS 420 / 535
.~.~.~.~ Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing

Current as of: June, 1999
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420 /   HD   ALLOYS OR METALLIC COMPOSITIONS

528  DF  ALUMINUM BASE {7}
529  DF  .~ Copper containing {6}
533  DF  .~.~ Magnesium containing {1}
534  DF  .~.~.~ Silicon containing {2}
535.~.~.~.~ Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing

DEFINITION

Classification: 420/535

Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing:

(under subclass 534) Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalium.