US PATENT SUBCLASS 73 / 61.71
.~.~ For measuring solid components (e.g., particles)

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

53.01  DF  LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
61.41  DF  .~ Content or effect of a constituent of a liquid mixture {8}
61.71.~.~ For measuring solid components (e.g., particles) {3}
61.72  DF  .~.~.~> By separation and subsequent measurement (e.g., by weighing, X-ray or microscope, etc.)
61.73  DF  .~.~.~> By flowing through barrier or restriction and measuring flow effect (e.g., pressure, volume of or rate of flow) {1}
61.75  DF  .~.~.~> Vibration

DEFINITION

Classification: 73/61.71

For measuring solid components (e.g., particles):

(under subclass 61.41) Subject matter wherein the determination is made by measuring or detecting the identity of, the amount of or the effect of a solid constituent of the liquid mixture.

SEE OR SEARCH THIS CLASS, SUBCLASS:

865.5, for measuring particle size, per se.

SEE OR SEARCH CLASS

356, Optics: Measuring and Testing,

335+, for determining particle size by measuring scattered visible light and subclass 544 for measuring visible light transmission to inspect or to study a suspension of particles in a liquid.

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for colloid systems or agents for such systems or making or stabilizing such systems or agents,

113+, for compositions for or subcombination compositions for or breaking of or inhibiting of colloid systems (e.g., foam breaking, emulsion breaking, dispersion inhibiting, suspension settling, gel breaking, smoke suppressing, coagulating, flocculating), in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.