US PATENT SUBCLASS 148 / 544
.~.~.~.~ With working


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}
538  DF  .~ With casting or solidifying from melt {6}
540  DF  .~.~ Iron(Fe) or iron base alloy {5}
543  DF  .~.~.~ Containing at least 1.5 percent carbon {2}
544.~.~.~.~ With working


DEFINITION

Classification: 148/544

With working:

(under subclass 543) Process which involves a metal deforming step.