US PATENT SUBCLASS 420 / 580
CONTAINING OVER 50 PER CENT METAL BUT NO BASE METAL

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

580CONTAINING OVER 50 PER CENT METAL BUT NO BASE METAL {4}
581  DF  .~> Iron containing {2}
587  DF  .~> Copper containing
588  DF  .~> Chromium containing
589  DF  .~> Tin containing

DEFINITION

Classification: 420/580

CONTAINING OVER 50 PERCENT METAL BUT NO BASE METAL:

(under the class definition) Alloy, or metallic composition which contains over 50 percent of total metal by weight but wherein each individual metal is present in an amount of not over 50 percent by weight.