(under subclass 402) Subject matter including one or a plurality of surfaces which reflect different colors or tints of a color for comparison with the color of the samples to be tested.
(1) Note. The surface may be a liquid. The surfaces of the standard need not be of the same material as the sample to be tested.
(2) Note. This group of subclasses includes both the chart and standards, per se, as defined in the above definition as well as color testing devices incorporating such charts or standards and not classifiable above.
(3) Note. The standards and the comparative devices of this group are the type wherein a comparison of known and unknown is made simultaneously and may be of manipulative or hand held visual type; but these subclasses also provided for the photoelectric type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43+, for reflective standards where color is involved to determine the temperature of a heated object or emissive source.
243.1+, for optical standards generally as where color is not involved.
244+, for supports for liquid or solid standards generally. SEE OR SEARCH CLASS
43, Fishing, Trapping, and Vermin Destroying,
1, for fishing implements which utilize color to test for the most effective colored lure for the existing water conditions.
