US PATENT SUBCLASS 420 / 552
.~ 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}
552.~ Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing {1}
553  DF  .~.~> Manganese containing

DEFINITION

Classification: 420/552

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

(under subclass 528) Alloy, or metallic composition which additionally contains at least one of the metals, titanium, zirconium, hafnium, vanadium, niobium, or tantalum.