US PATENT SUBCLASS 73 / 61.48
.~.~.~ By optical irradiation

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}
61.43  DF  .~.~ Liquid constituent of a liquid mixture {9}
61.48.~.~.~ By optical irradiation

DEFINITION

Classification: 73/61.48

By optical irradiation:

(under subclass 61.43) Subject matter wherein the determination is made by measuring the effect of the sediment on visible light.

SEE OR SEARCH CLASS

250, Radiant Energy, appropriate subclasses for a photocell, per se, and for analyzing a liquid utilizing invisible light which is modified by transmission through or emission by the liquid being tested wherein the modified light is tested.

356, Optics: Measuring and Testing, appropriate subclass for an optical measuring of fluid using visible light and involving no manipulation other than that necessary to perform the optical test.