US PATENT SUBCLASS 430 / 27
.~ With filter material on finished faceplate

Current as of: June, 1999
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430 /   HD   RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF

23  DF  PRODUCING CATHODE-RAY TUBE OR ELEMENT THEREOF {6}
27.~ With filter material on finished faceplate

DEFINITION

Classification: 430/27

With filter material on finished faceplate:

(under subclass 23) Processes wherein the contrast of the finished faceplate is improved by incorporating filter material which is colormetrically related to the phosphor areas on the faceplate.