(under subclass 282) Process of drying a treated material by cooling by evaporating moisture contained within the material to produce a frozen mass and then applying a means to remove or decrease the amount of moisture in the treated material.
(1) Note. Freezing by application of a vacuum plus other treating is in this subclass; for other vacuum treating see subclasses 406+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
391, for combined drying or cooling not involving freezing, and subclass 428 for cooling by gas or vapor contact.
SEE OR SEARCH CLASS
62, Refrigeration,
532+, and 123+ for separating liquids by freezing.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, 5+, for a method for comminuting liquids into particulate solid material which may include freezing with or without
drying of cooling fluid.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
113+, for compositions for or subcombination compositions for or breaking of or inhibiting of colloid systems (e.g., foam breaking, emulsion breaking, dispersion inhibiting, suspension settling, gel breaking, smoke suppressing, coagulating, flocculating), when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.
