US PATENT SUBCLASS 73 / 54.15
.~.~ Gravity movement of an object in a liquid (e.g., a bubble)

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}
54.01  DF  .~ Viscosity {11}
54.15.~.~ Gravity movement of an object in a liquid (e.g., a bubble) {5}
54.16  DF  .~.~.~> With detail of temperature or pressure regulating or compensating means
54.17  DF  .~.~.~> Using a reference fluid
54.18  DF  .~.~.~> With means for restoring an object to its initial starting position (e.g., magnetic or fluid means)
54.19  DF  .~.~.~> Including detail of a timing detection circuit
54.21  DF  .~.~.~> Including an object concentricity guide means

DEFINITION

Classification: 73/54.15

Gravity movement of an object in a liquid ( e. g., a bubble):

(under subclass 54.01) Subject matter wherein the determination is made by measuring rate at which an object rises (usually a bubble) or sinks in the liquid.