US PATENT SUBCLASS 210 / 95
.~.~ Sight glass

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

85  DF  WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS {7}
94  DF  .~ Transparent {1}
95.~.~ Sight glass

DEFINITION

Classification: 210/95

(under subclass 94) Apparatus comprising transparent means associated with treatment apparatus through which material being treated can be viewed.

SEE OR SEARCH CLASS

73, Measuring and Testing,

323+, for liquid level sight glasses of general application.