US PATENT SUBCLASS 420 / 56
.~.~ Eight percent or more total nickel plus manganese 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.~.~ Eight percent or more total nickel plus manganese containing {3}
57  DF  .~.~.~> Molybdenum or tungsten containing
58  DF  .~.~.~> Copper containing
59  DF  .~.~.~> Over 0.20 percent nitrogen containing

DEFINITION

Classification: 420/56

Eight percent or more total nickel plus manganese containing:

(under subclass 34) Alloy or metallic composition which additionally contains a total quantity of nickel plus manganese of 8 percent or more.

(1) Note. When the alloy contains 8 percent or more

manganese, nickel may be completely absent.

(2) Note. This amount of nickel plus manganese usually renders the alloy austentic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, for authentic stainless steel which contains 8 percent or more nickel.