US PATENT SUBCLASS 73 / 54.17
.~.~.~ Using a reference fluid

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  DF  .~.~ Gravity movement of an object in a liquid (e.g., a bubble) {5}
54.17.~.~.~ Using a reference fluid

DEFINITION

Classification: 73/54.17

Using a reference fluid:

(under subclass 54.15) Subject matter wherein the determination is made by comparing the time of flight of an object through the liquid being tested with the time of flight of same or a second identical object through a liquid of a known standard viscosity.