US PATENT SUBCLASS 373 / 90
.~.~ Non-consumable

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

60  DF  ARC FURNACE DEVICE {9}
88  DF  .~ Electrode {4}
90.~.~ Non-consumable

DEFINITION

Classification: 373/90

Nonconsumable:

(under subclass 88) Subject matter wherein the electrode means remains substantially intact during operation.

(1) Note. Generally these electrodes include internal water cooling.

(2) Note. Carbon or graphite electrodes are excluded from this subclass unless the carbon, or graphite forms only the tip of the electrode.