(under the class definition) Processes combined with the positive step of visually, chemically or physically determining some chemical or physical characteristic or property of the distilland, vapor, residue or condensate.
SEE OR SEARCH CLASS
73, Measuring and Testing, appropriate subclasses, particularly 700+ for a device for the direct measurement of pressure.
137, Fluid Handling,
2+, for a process of fluid handling in which one or more characteristics or conditions of a fluent material are determined.
162, Paper Making and Fiber Liberation,
238, for a digester with automatic control means. 196, Mineral Oils: Apparatus,
132, for a mineral oil vaporizer provided with means for automatically maintaining desired conditions.
202, Distillation: Apparatus,
151, 160, 193, 196, and 206 for distillation apparatus having control devices and see "SEARCH CLASS" under each subclass for related fields of search.
203, Distillation: Processes, Separatory,
1+, for a process directed to distilling, combined with measuring, testing or inspecting.
324, Electricity: Measuring and Testing, appropriate subclasses for a device for determining an appropriate physical characteristic of a material by electrical means.
361, Electricity: Electrical Systems and Devices, appropriate subclasses for electrical systems not otherwise classified and see "SEARCH CLASS" under the Class Definitions for various types of electrical systems.
374, Thermal Measuring and Testing,
100+, for a device for quantitatively determining temperature.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 50+, for chemical apparatus for (a) determining quantitatively or qualitatively the presence of one or more chemical constituents of a material and (b) combination of a test or measurement means and means for regulating a chemical reaction.
436, Chemistry: Analytical and Immunological Testing,
1, 183 for processes which quantitatively or qualitatively determine the presence of a chemical specie.
