US PATENT SUBCLASS 324 / 643
.~.~.~.~ To determine water content

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
642  DF  .~.~.~ Where energy is reflected (e.g., reflectometry) {4}
643.~.~.~.~ To determine water content

DEFINITION

Classification: 324/643

To determine water content:

(under subclass 642) Subject matter including measurement of the test substance water content.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

640, for determination of water content by using microwave energy transmitted through a substance under test.

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

689, for determination of moisture content of a substance 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. SEE OR SEARCH CLASS

73, Measuring and Testing,

73+, for moisture content or absorption characteristics of material; subclasses 335+ for hygrometers.

200, Electricity: Circuits 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 systems.

361, Electricity: Electrical Systems and Devices,

78, and 286 for humidity responsive circuits and capacitors.