.~> For analysis of gas, vapor, or particles of matter {6}
DEFINITION
Classification: 324/459
USING IONIZATION EFFECTS:
(under the class definition) Subject matter wherein a medium is ionized and the ionized medium is used to measure or monitor a property or condition distinct from the cause of the ionization.
(1) Note. The patents here are measuring a property or condition separate or distinct from the ionized medium itself.
(2) Note. Where the pressure of the ionized medium or its constituents or properties itself are being monitored, it will be found in one of the indented subclasses.
SEE OR SEARCH CLASS
250, Radiant Energy,
306+, for using charged particles to inspect solids or liquids; also, subclasses 374+ for sensing invisible radiation, per se, which causes ionization. The ionization is a measure of the ionizing radiation. Testing for other than radiation, by ionizing means, is classified here.
315, Electric Lamp and Discharge Devices: Systems, for discharge devices, per se, which depend upon ionization for its operation. See
129+, for indicating some condition of a load device such as a discharge tube. 340, Communications: Electrical,
579, for systems for detecting flame by ionization means; subclass 600 for systems for detecting radiant energy; and subclass 629 for systems for detecting smoke using ionization means.
