(under subclass 14.1) Apparatus which sprays a liquid or gaseous material into an atmosphere in which the ambient temperature is below the materials' freezing point thereby precipitating the material as a particulate solid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2.2, for methods of snowmaking.
SEE OR SEARCH CLASS
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
1+, for continuous gas or vapor phase colloid system (e.g., smoke, fog, aerosol, cloud, mist) or agents for such systems or making or stabilizing such systems or agents, when generically claimed or when there is no hierarchically
superior provision in the USPC for the specifically claimed art; and when not disclosed as adapted to (1) wet a surface or (2) to precipitate atmospheric moisture, for which see Class 239, the appropriate subclass for compositions for or methods of breaking or inhibiting continuous gas or vapor phase colloid systems.
