US PATENT SUBCLASS 373 / 109
RESISTANCE FURNACE DEVICE

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

109RESISTANCE FURNACE DEVICE {7}
110  DF  .~> With internal atmosphere control (e.g., pressure, vacuum, etc.) {2}
113  DF  .~> For cooling {1}
115  DF  .~> Charging or discharging
116  DF  .~> For manipulation of the charge or melt (e.g., stirring)
117  DF  .~> With heating element detail {7}
135  DF  .~> Control {1}
137  DF  .~> Lining

DEFINITION

Classification: 373/109

RESISTANCE FURNACE DEVICE:

(under the class definition) Subject matter including electrical resistance means as the heating element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, and 5+, for resistance furnaces combined with other types of furnaces.

27+, for glass furnaces which are a species of resistance furnaces.

SEE OR SEARCH CLASS

219, Electric Heating,

50+, for resistance heating of metal general; subclasses 200+ for resistance heating devices used to heat nonmetals.