(under subclass 363) Structures not classifiable in the indented subclasses by or in which the sifting passages of sifters are formed, and special combinations or successions of particular types or sizes of passages.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233+, for sifter structure combined with other attributes of a sifting operation.
659+, for size separation of special items.
SEE OR SEARCH CLASS
34, Drying and Gas or Vapor Contact With Solids,
237, for reticulated floors for distributing a drying medium.
