US PATENT SUBCLASS 356 / 239.7
.~.~ Surface condition

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

237.1  DF  INSPECTION OF FLAWS OR IMPURITIES {6}
239.1  DF  .~ Transparent or translucent material {4}
239.7.~.~ Surface condition {1}
239.8  DF  .~.~.~> Detection of an object or particle on surface

DEFINITION

Classification: 356/239.7

Surface condition:

(under subclass 239.1) Inspection of transparent or translucent material wherein the specimen being detected is an exterior or an interior veneer of the container.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237.2, for the inspection of a surface condition.

243.4, for a surface condition standard.

SEE OR SEARCH CLASS

250, Radiant Energy,

559.4+, for circuitry responsive to a photocell, and wherein the photocell is arranged relative to the material so that the circuit provides an output indicating the presence or absence of the material or some indicia on the material in some predefined location.