(under subclass 239) Subject matter claiming the materials of which the structures classified in this class are constructed.
SEE OR SEARCH CLASS
75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,
301, for a furnace lining which reacts with the charge.
201, Distillation: Processes, Thermolytic,
18, for a thermolytic distillation process including utilizing apparatus of a particular composition.
203, Distillation: Processes, Separatory,
86, for separatory distillation process including reciting apparatus or an element in terms of its composition. 264, Plastic and Nonmetallic Article Shaping or Treating: Processes,
30, for forming or repairing furnace lining and see, "SEARCH CLASS" thereunder for related fields of search.
373, Industrial Electric Heating Furnaces, appropriate subclasses for electric furnace linings and processes for making.
