US PATENT SUBCLASS 148 / 706
.~.~ Lead(Pb) or lead base alloy

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
559  DF  .~ Heating or cooling of solid metal {22}
706.~.~ Lead(Pb) or lead base alloy

DEFINITION

Classification: 148/706

Lead (Pb) or lead base alloy:

(under subclass 559) Process wherein the metal being treated is lead (Pb) or a lead alloy containing greater than 50 percent lead.