US PATENT SUBCLASS 420 / 425
NIOBIUM BASE

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

425NIOBIUM BASE {1}
426  DF  .~> Titanium, zirconium, or hafnium containing

DEFINITION

Classification: 420/425

NIOBIUM BASE:

(under the class definition) Alloy, or metallic composition containing over 50 percent of niobium.