US PATENT SUBCLASS 420 / 548
.~ Silicon containing

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

528  DF  ALUMINUM BASE {7}
548.~ Silicon containing {1}
549  DF  .~.~> Alkali, or alkaline earth metal containing

DEFINITION

Classification: 420/548

Silicon containing:

(under subclass 528) Alloys, or metallic composition which additionally contains silicon.