US PATENT SUBCLASS 420 / 69
.~.~.~ Vanadium, niobium or tantalum containing

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

8  DF  FERROUS (I.E., IRON BASE) {24}
34  DF  .~ Nine percent or more chromium containing {14}
67  DF  .~.~ Molybdenum or tungsten containing {2}
69.~.~.~ Vanadium, niobium or tantalum containing

DEFINITION

Classification: 420/69

Vanadium, niobium or tantalum containing:

(under subclass 67) Alloy or metallic composition which additionally contains one or more of vanadium, niobium and tantalum.