US PATENT SUBCLASS 420 / 430
TUNGSTEN BASE

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

430TUNGSTEN BASE {2}
431  DF  .~> Carbon, boron or nitrogen containing
432  DF  .~> Rhenium or noble metal containing

DEFINITION

Classification: 420/430

TUNGSTEN BASE:

(under the class definition) Alloy, or metallic composition which contains over 50 percent of tungsten.