US PATENT SUBCLASS 266 / 257
.~.~.~ Having atmosphere generating means within treating zone

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  DF  .~.~ With heating means {4}
257.~.~.~ Having atmosphere generating means within treating zone

DEFINITION

Classification: 266/257

(under subclass 252) Device wherein means are provided within the work confining chamber for evolving a gaseous treating agent.