US PATENT SUBCLASS 250 / 573-- .~.~ Fluent material in optical path

US PATENT SUBCLASS 250 / 573
.~.~ Fluent material in optical path

Current as of: June, 1999
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250 /	HD	RADIANT ENERGY

200	DF	PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216	DF	.~ Optical or pre-photocell system {11}
573		.~.~ Fluent material in optical path {4}
574	DF	.~.~.~> Scattered or reflected light
575	DF	.~.~.~> Plural paths
576	DF	.~.~.~> Sample holder or supply
577	DF	.~.~.~> Volume or level

DEFINITION

Classification: 250/573

(under subclass 216) Subject matter having fluent material in the optical path.

(1) Note. The fluent material may, e.g., be a fluid, particulate matter suspended in a fluid, smoke, powder or sabulous material.

SEE OR SEARCH CLASS

73, Measuring and Testing,

53.01+, for a liquid analyzer having radiant energy detection means therein and especially subclass 61.69 for a sedimentation rate measuring apparatus including radiant energy responsive means and subclass 61.48 for analyzing a liquid constituent of a liquid mixture by means of optical irradiation.