US PATENT SUBCLASS 266 / 193
.~.~.~ By means embedded in heating means

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

168  DF  MEANS FOR TREATING ORES OR FOR EXTRACTING METALS {3}
171  DF  .~ By means applying heat to work, e.g., furnace {10}
190  DF  .~.~ With cooling of heating means {3}
193.~.~.~ By means embedded in heating means {1}
194  DF  .~.~.~.~> Having means to facilitate removal of cooling means

DEFINITION

Classification: 266/193

(under subclass 190) Device wherein the temperature is maintained within acceptable limits by a cooling medium flowing through a heat-exchange member contained within the wall or base structure of the heating means.