(under the class definition) Subject matter wherein the combining capacity of a substance with a reagent is measured or the hydrogen ion concentration is determined.
SEE OR SEARCH CLASS
73, Measuring and Testing,
19.01+, and 23.2+ for physical methods of gas analysis, especially subclasses 23.35+ for chromatos:graphic analysis.
204, Chemistry: Electrical and Wave Energy,
400+, for electrolytic analysis and testing apparatus, especially subclass 433 for electrolytic apparatus used to measure carbon or pH.
205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,
775+, for electrolytic analysis or testing processes, especially subclass 787.5 for analysis or testing to determine pH by electrolysis and subclass 788.5 for electrolytic analysis or testing involving titration. 324, Electricity: Measuring and Testing,
438, for a process which uses an electrical device to determine the hydrogen ion concentration absent any step involving a chemical reaction.
600, Surgery,
309, for a method of measuring pH of a body fluid on, or in the living body.
