US PATENT SUBCLASS 73 / 54.08
.~.~.~.~ Including a photocell

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}
54.04  DF  .~.~ Friction tube (e.g., capillary) {3}
54.07  DF  .~.~.~ By time interval of travel or flow rate measuring {1}
54.08.~.~.~.~ Including a photocell

DEFINITION

Classification: 73/54.08

Including a photocell:

(under subclass 54.07) Subject matter including means having an electrical characteristic which changes in response to light.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54.13, for determining viscosity by measuring a time interval of travel or flow rate using an orifice, nozzle, or extrusion means wherein there is disclosed detail of a means whose optical character changes due to a change in a physical phenomenon associated with the liquid whose viscosity is being measured.

866.5, for a sensor, per se.

SEE OR SEARCH CLASS

250, Radiant Energy,

200+, for photocell detectors, per se.