US PATENT SUBCLASS 420 / 543
.~.~ 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}
542  DF  .~ Magnesium containing {3}
543.~.~ Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing {2}
544  DF  .~.~.~> Silicon containing
545  DF  .~.~.~> Chromium containing

DEFINITION

Classification: 420/543

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

(under subclass 542) Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalum.