US PATENT SUBCLASS 420 / 64
.~.~ Boron 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}
64.~.~ Boron containing

DEFINITION

Classification: 420/64

Boron containing:

(under subclass 34) Alloy or metallic composition which additionally contains boron.