US PATENT SUBCLASS 420 / 87
.~ Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability

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

8  DF  FERROUS (I.E., IRON BASE) {24}
87.~ Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability {1}
88  DF  .~.~> Processes of making or treating alloy containing over 0.04 percent phosphorus

DEFINITION

Classification: 420/87

Over 0.05 percent sulfur, over 0.04 percent phosphorus, or sulfur or phosphorus added in any amount to promote machinability:

(under subclass 8) Alloy or metallic composition which contains one or more of more than 0.05 percent sulfur or more than 0.04 percent phosphorus or which contain any amount of sulfur or phosphorus which is positively stated to be present to promote machinability of this alloy or metallic composition.