US PATENT SUBCLASS 420 / 488
.~.~ Refractory metal containing

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

469  DF  COPPER BASE {15}
485  DF  .~ Nickel containing {3}
488.~.~ Refractory metal containing

DEFINITION

Classification: 420/488

Refractory metal containing:

(under subclass 485) Alloy, or metallic composition which additionally contains at least one of the metals titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum, or tungsten.