US PATENT SUBCLASS 420 / 89
.~ Copper 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.~ Copper containing {3}
90  DF  .~.~> Chromium containing {1}
92  DF  .~.~> Nickel containing
93  DF  .~.~> Vanadium, zirconium, titanium or molybdenum containing

DEFINITION

Classification: 420/89

Copper containing:

(under subclass 8) Alloy or metallic composition which additionally contains copper.