US PATENT SUBCLASS 373 / 80
.~.~ With charge pre-heating

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

60  DF  ARC FURNACE DEVICE {9}
79  DF  .~ Charging or discharging {4}
80.~.~ With charge pre-heating

DEFINITION

Classification: 373/80

With charge preheating:

(under subclass 79) Subject matter including means to heat the charge prior to heating the charge within the furnace.