(under subclass 293) Processes directed to or including crystallization as a significant step.
SEE OR SEARCH CLASS
29, Metal Working,
25.35, for processes of manufacturing piezo-electric crystal devices which include crystallizing and additional manufacturing operations.
62, Refrigeration, for processes of crystallization including a step of refrigeration, especially see
66+, and subclasses 532+. 65, Glass Manufacturing,
33.1+, for a process of devitrifying of vitrifying glass combined with a glassworking operation.
117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor, for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including inorganic or organic.
127, Sugar, Starch, and Carbohydrates,
58+, for the crystallization of sugar.
159, Concentrating Evaporators, for processes for mere evaporation of a solution or suspension of a solid in a liquid whether or not the claims are directed to treatment of a definite chemical compound or element, unless such processes are provided for elsewhere. The combination of evaporation and significant crystallization is in this class (23).
203, Distillation: Processes, Separatory,
48, for a distillation process including the step of crystallizing a material from a distillate or residue.
423, Chemistry of Inorganic Compounds, appropriate subclasses, for chemical processes of manufacturing inorganic compounds and nonmetallic elements which may involve crystallizing.
501, Compositions: Ceramic,
2+, for devitrified glass compositions, and subclass 86 for synthetic precious stone compositions.
