US PATENT SUBCLASS 148 / 422
.~ Vanadium, niobum, or tantalum base

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

400  DF  STOCK {20}
422.~ Vanadium, niobum, or tantalum base

DEFINITION

Classification: 148/422

Vanadium, niobium or tantalum base:

(under subclass 400) Stock material which contains over 50 percent vanadium, over 50 percent niobium, or over 50 percent tantalum by weight.