(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 feed, vapor, residue or condensate.
(1) Note. The chemical or physical characteristic must be positively stated in the claim for the purpose of this and indented subclasses, e.g., measuring the temperature. Heating to a specified temperature is not determining a characteristic within the purview of this and indented subclasses.
SEE OR SEARCH CLASS
73, Measuring and Testing, appropriate subclasses for measuring and testing apparatus.
137, Fluid Handling,
2+, for a process in which a condition or characteristic of a fluent material is determined and used to control the system.
162, Paper Making and Fiber Liberation, 238, for a digester with automatic control means.
196, Mineral Oils: Apparatus,
132, for mineral oil vaporizing apparatus provided with automatic control.
201, Distillation: Processes, Thermolytic,
1, for a process directed to thermolytic distillation combined with measuring, testing or inspecting.
202, Distillation: Apparatus,
151, 160, 193, 196, 206 for distillation apparatus having control devices and see "SEARCH CLASS" under each subclass.
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.
436, Chemistry: Analytical and Immunological Testing,
230+, for a process of chemically testing not combined with a distillation process.
