US PATENT SUBCLASS 420 / 90
.~.~ Chromium containing

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

8  DF  FERROUS (I.E., IRON BASE) {24}
89  DF  .~ Copper containing {3}
90.~.~ Chromium containing {1}
91  DF  .~.~.~> Nickel containing

DEFINITION

Classification: 420/90

Chromium containing:

(under subclass 89) Alloy or metallic composition which additionally contains chromium.