US PATENT SUBCLASS 266 / 163
.~.~ With rotating heating vessel

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

161  DF  MEANS FOR EXTRACTING AND REFINING METAL {1}
162  DF  .~ With separate refining zone {2}
163.~.~ With rotating heating vessel

DEFINITION

Classification: 266/163

(under subclass 162) Device including an extracting or refining means adapted to revolve about it longitudinal axis.