US PATENT SUBCLASS 373 / 72
.~.~ Hearth or crucible

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

60  DF  ARC FURNACE DEVICE {9}
71  DF  .~ Furnace body detail {4}
72.~.~ Hearth or crucible

DEFINITION

Classification: 373/72

Hearth or crucible:

(under subclass 71) Subject matter including the part of the furnace structure which holds the molten material.