US PATENT SUBCLASS 324 / 640
.~.~.~.~ 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}
637  DF  .~.~ Using transmitted or reflected microwaves {3}
639  DF  .~.~.~ Where energy is transmitted through a test substance {2}
640.~.~.~.~ To determine water content

DEFINITION

Classification: 324/640

To determine water content:

(under subclass 639) Subject matter for determining the water content of the test substance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

634, for determination of water content by measuring distributive type parameters using resonant frequency.

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

664+, for determination of water content by using capacitive type measurement.

689, for determination of moisture content of a substance by using a capacitive sensing device or apparatus.

694+, for determination of moisture content of a substance using a resistive or conductive type measurement device or apparatus. 696, for resistive probe 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 335+ 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.