US PATENT SUBCLASS 266 / 154
.~.~ Vertical shaft furnace

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

144  DF  WITH MEANS TREATING OR HANDLING GASES EXHAUSTED BY TREATING MEANS {8}
148  DF  .~ By condensing and collecting a volatile constituent {6}
154.~.~ Vertical shaft furnace

DEFINITION

Classification: 266/154

(under subclass 148) Device wherein the vapors are evolved from an elongated chamber the major axis of which is substantially perpendicular to the horizon and through which the vapor generating material is moved by the effects of gravity.