US PATENT SUBCLASS 420 / 426
.~ Titanium, zirconium, or hafnium containing

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

425  DF  NIOBIUM BASE {1}
426.~ Titanium, zirconium, or hafnium containing

DEFINITION

Classification: 420/426

Titanium, zirconium or hafnium containing:

(under subclass 425) Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, or hafnium.