US PATENT SUBCLASS 356 / 422
.~.~ Plate

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

402  DF  BY SHADE OR COLOR {10}
421  DF  .~ With reflective multicolor chart or standard {2}
422.~.~ Plate {1}
423  DF  .~.~.~> Disk

DEFINITION

Classification: 356/422

Plate:

(under subclass 421) Subject matter wherein the surfaces are formed as flat, platelike colored structures.

SEE OR SEARCH THIS CLASS, SUBCLASS:

229, for the comparison of light intensities where no color is involved and where the unknown light is compared with

flat, platelike structures forming light reflecting standards.

243.1+, for visual standards other than the colored type.

433+, for the comparison of light transmitted through an unknown substance with light reflective standard plates where color is not involved.

448, for the comparison of light reflected from an unknown substance with light reflective standard plates where color is not involved.

SEE OR SEARCH CLASS 422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

61, for analytical apparatus which may be in the form of kits which utilize flat, platelike colored standards as a basis for a visual or photoelectric comparison with a colored substance reactively produced in order to determine the presence of a chemical element, anion, or cation.