US PATENT SUBCLASS 420 / 557
TIN BASE

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

557TIN BASE {3}
558  DF  .~> Lead containing {1}
560  DF  .~> Copper containing {1}
562  DF  .~> Antimony, or bismuth containing

DEFINITION

Classification: 420/557

TIN BASE:

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