(under the class definition) Apparatus including supporting surfaces upon which material is placed. These may include a mere surrounding flange.
(1) Note. Complete the search in this class, subclass 192 and indented subclasses, particularly subclasses 197, 198 and 200. These subclasses must be searched for housings or supports as well as for the subject provided for in this and the indented subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
172, and 178, for plural floors with gravity flow therebetween.
225, and 233, and see notes.
239, and 240.
SEE OR SEARCH CLASS 52, Static Structures (e.g., Buildings),
660+, for fabric or lattice openwork, e.g., gratings, not elsewhere provided for.
209, Classifying, Separating, and Assorting Solids,
392+, for sifting element dress.
210, Liquid Purification or Separation,
498, and 499 for filter plates or screens.
432, Heating,
253+, for a means specialized to holding, shielding, or supporting work within a furnace.
