US PATENT SUBCLASS 420 / 81
.~.~ Zirconium, vanadium or titanium containing

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

8  DF  FERROUS (I.E., IRON BASE) {24}
77  DF  .~ Four percent or more aluminum containing {4}
81.~.~ Zirconium, vanadium or titanium containing

DEFINITION

Classification: 420/81

Zirconium, vanadium or titanium containing alloy or metallic composition:

(under subclass 77) Alloy or metallic composition which additionally contains one or more of zirconium, vanadium or titanium.