US PATENT SUBCLASS 420 / 43
.~.~ Eight percent or more nickel 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}
43.~.~ Eight percent or more nickel containing {6}
44  DF  .~.~.~> Over 2 percent manganese containing {3}
49  DF  .~.~.~> Copper containing
50  DF  .~.~.~> Over 1.5 percent silicon containing {1}
52  DF  .~.~.~> Molybdenum containing {1}
54  DF  .~.~.~> Group IV or V transition metal containing
55  DF  .~.~.~> Over 0.1 percent carbon containing

DEFINITION

Classification: 420/43

Eight percent or more nickel containing:

(under subclass 34) Alloy or metallic composition which additionally contains 8 percent or more of nickel.

(1) Note. This amount of nickel usually renders the alloy austenitic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56, for austenitic stainless steel which contains less than 8 percent nickel but which contains manganese instead to bring the total of the two elements to over 8 percent.