(under subclass 19.01) Subject matter wherein the gas content of the liquid is determined by measuring the pressure of the gas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
24.04, for measuring vapor pressure of gas by vibration.
25.04, for measuring vapor pressure of gas by measuring a thermal property of the gas.
29.01+, for determining the vapor pressure of gas being tested.
31.04, for analyzing gas by pressure measurement, per se.
37+, for a testing apparatus or process for subjecting a specimen directly to fluid pressure (positive or negative) to determine a property of the specimen.
78+, for a device for measuring hardness as an index of fluid pressure, particularly subclass 80 for a tonometer and subclass 81 for a tire hardness gauge. 115, for a process or an apparatus which measures the pressure within an engine to determine its efficiency.
299+, for a hydrostatic pressure type of liquid level or depth gauge.
384, for a barometer.
700+, for measurement of the pressure of fluent material.
861.42+, for a pressure differential measuring device for determining volume or rate of flow.
SEE OR SEARCH CLASS
128, Surgery,
672+, for a blood pressure measuring device.
138, Pipes and Tubular Conduits,
26+, for a device of that class type combined with pressure compensator.
200, Electricity: Circuit Makers and Breakers, 81+, for a fluid pressure operated switch.
