US PATENT SUBCLASS 420 / 51
.~.~.~.~ Group IV or V transition metal 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}
43  DF  .~.~ Eight percent or more nickel containing {6}
50  DF  .~.~.~ Over 1.5 percent silicon containing {1}
51.~.~.~.~ Group IV or V transition metal containing

DEFINITION

Classification: 420/51

Group IV or V transition metal containing:

(under subclass 50) Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantalum.