US PATENT SUBCLASS 324 / 634
.~.~.~ To determine water content

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

600  DF  IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS {8}
629  DF  .~ Distributive type parameters {6}
633  DF  .~.~ Using resonant frequency {3}
634.~.~.~ To determine water content

DEFINITION

Classification: 324/634

To determine water content:

(under subclass 633) Subject matter wherein the analyzed parameter of a substance under resonant test is moisture content.

SEE OR SEARCH THIS CLASS, SUBCLASS:

640, for determining water content by using electric energy transmitted through a substance under test.

643, for determining water content by using electric energy reflected from a substance under test.

658, and 667, for determining moisture content of a substance using a resonant capacitive sensing device or apparatus.

694+, for determining moisture content of a substance using a resistive or conductive type measurement device or apparatus.

696, for resistive probe type structure used to determine water content.

SEE OR SEARCH CLASS 73, Measuring and Testing,

73+, for moisture control or absorption characteristics of material; and subclasses 29.02+ for hygrometers.

200, Electricity: Circuit Makers and Breakers,

61.04, for liquid responsive switches.

338, Electrical Resistors,

35, for moisture sensing resistors.

340, Communications: Electrical,

602+, for moisture condition responsive indicating systems.

361, Electricity: Electrical Systems and Devices,

178, and 286 for humidity responsive circuits and capacitors.