US PATENT SUBCLASS 420 / 86
.~.~.~ Adding lead

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

8  DF  FERROUS (I.E., IRON BASE) {24}
84  DF  .~ Lead, bismuth, selenium, tellurium or calcium containing {1}
85  DF  .~.~ Processes {1}
86.~.~.~ Adding lead

DEFINITION

Classification: 420/86

Adding lead:

(under subclass 85) Processes wherein the added elements under subclass 84 includes lead.