US PATENT SUBCLASS 420 / 100
.~.~ 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}
99  DF  .~ One percent or more carbon containing, but less than 1.7 percent {1}
100.~.~ Chromium containing {1}
101  DF  .~.~.~> Molybdenum containing {1}

DEFINITION

Classification: 420/100

Chromium containing:

(under subclass 99) Alloy or metallic composition which additionally contains chromium.

(1) Note. Many patents in this and indented subclasses are drawn to alloys which are sufficiently heat resistant to be used to cut metal at relatively high speed, i.e., "high

speed" steel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104+, for so called "high speed" steel alloys containing less that 1 percent carbon.