(under the class definition) Apparatus including structure for preparing heating chamber fumes for discharge by diluting them, destroying harmful vapors in them by combustion, or by purifying them by other means.
SEE OR SEARCH CLASS
60, Power Plants,
685+, for the treatment of power plant exhaust.
266, Metallurgical Apparatus,
144+, for a metallurgical furnace having an arrester for metallurgical fume.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 198+, for apparatus for purifying a gas by combustion.