US PATENT SUBCLASS 73 / 53.01
LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID

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

53.01LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
53.02  DF  .~> Butter fat content
53.03  DF  .~> Paper or wood suspension (e.g., paper or wood pulp) {1}
53.05  DF  .~> Lubricant testing {2}
54.01  DF  .~> Viscosity {11}
60.11  DF  .~> Cleaning or foaming ability
61.41  DF  .~> Content or effect of a constituent of a liquid mixture {8}
64.41  DF  .~> Gelling or coagulation {2}
64.44  DF  .~> Vapor-liquid ratio
64.45  DF  .~> Vapor pressure {1}
64.47  DF  .~> Osmotic pressure (e.g., diffusion characteristic)
64.48  DF  .~> Surface tension {3}
64.53  DF  .~> By vibration
64.54  DF  .~> Molecular weight
64.55  DF  .~> Interface
64.56  DF  .~> Sampler, constituent separation, sample handling, or sample preparation

DEFINITION

Classification: 73/53.01

LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID:

(under the class definition) Subject matter comprising a process or an apparatus for detecting or determining the

composition of, a constituent of, or a property of a liquid or a liquid suspension of a solid.

(1) Note. Determining is considered to include measuring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10, for testing the effect of a lubricant on frictional resistance or coefficient.

32, for determining the specific gravity or the density of a liquid or a liquid suspension of a solid wherein the density measuring is not used to further determine some other property of the liquid or the liquid suspension.

35.02, for measuring engine knock or detonation in order to determine a fuel rating.

152.42+, for determining a characteristic of a borehole, a casing, or a drill rigging by analyzing a fluid. 169, for determining the physical characteristic of dough.

170.17+, for a rain gauge.

290+, for a liquid level gauge.

592, for liquid leakage or liquid location detection by using vibration.

700+, for a fluid pressure gauge.

861+, for measuring the volume or the rate of flow of a liquid.

SEE OR SEARCH CLASS

128, Surgery,

630+, for testing liquids wherein the test is conducted within a living body.

204, Chemistry: Electrical and Wave Energy, appropriate subclasses for electrolytic sensor, per se.

250, Radiant Energy, appropriate subclasses for using invisible light to test liquids and, in particular,

301+, for methods of determining oil presence, contamination, or concentration using radiant energy; subclasses 306+ for inspection of liquids by charged particles, subclasses 336.1+ for invisible radiant energy signalling of conditions of liquids and subclasses 573+ for optical or pre-optical systems having a liquid in the path there of wherein the modification of or the emission of radiant energy resulting from the irradiation of the liquid is tested.

340, Communications: Electrical,

603+, for a humanly perceptible indication of a predetermined condition of a liquid.

356, Optics: Measuring and Testing, appropriate subclass for determining a property of a liquid by measuring visible light.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, appropriate subclass for an apparatus for testing a liquid wherein a chemical reaction is involved.

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.