US PATENT SUBCLASS 266 / 252
.~.~ With heating means

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

249  DF  MEANS TREATING SOLID METAL {5}
251  DF  .~ By contact with gas {2}
252.~.~ With heating means {4}
253  DF  .~.~.~> Bottom feeding furnace
254  DF  .~.~.~> With indirect heat-exchange means for gas
255  DF  .~.~.~> Having work contained in separate, noncommunicating chamber, e.g., muffle {1}
257  DF  .~.~.~> Having atmosphere generating means within treating zone

DEFINITION

Classification: 266/252

(under subclass 251) Device wherein means are provided to elevate the temperature of the article being treated.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

349+, for glass annealing or tempering apparatus including heating and cooling means.

219, Electric Heating,

600+, for inductive heating and subclasses 50+, for other electric heating of metal. Note subclasses 74+, where a gas is supplied to the heated area.

432, Heating, 198, 199 and 200+, for furnaces of general utility having gas-introducing means.