US PATENT SUBCLASS 23 / 294 R
.~ Sublimation

Current as of: June, 1999
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23 /   HD   CHEMISTRY: PHYSICAL PROCESSES

293 R  DF  PHYSICAL PROCESSES {7}
294 R.~ Sublimation {1}
294 S  DF  .~.~> Sulfur

Unofficial Alpha Subclasses: R S

DEFINITION

Classification: 23/294

(under subclass 293) Processes directed to or including sublimation as a significant step.

SEE OR SEARCH CLASS

266, Metallurgical Apparatus,

144+, for metallurgical furnaces with fume arresters.