US PATENT SUBCLASS 420 / 59
.~.~.~ Over 0.20 percent nitrogen containing

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

8  DF  FERROUS (I.E., IRON BASE) {24}
34  DF  .~ Nine percent or more chromium containing {14}
56  DF  .~.~ Eight percent or more total nickel plus manganese containing {3}
59.~.~.~ Over 0.20 percent nitrogen containing

DEFINITION

Classification: 420/59

Over 0.20 percent nitrogen containing:

(under subclass 56) Alloy or metallic composition which additionally contains more than 0.20 percent nitrogen.