US PATENT SUBCLASS 503 / 225
.~ Identified electron acceptor (developer)

Current as of: June, 1999
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503 /   HD   RECORD RECEIVER HAVING PLURAL INTERACTIVE LEAVES OR A COLORLESS COLOR FORMER, METHOD OF USE, OR DEVELOPER THEREFOR

200  DF  HAVING A COLORLESS COLOR-FORMER, DEVELOPER THEREFOR, OR METHOD OF USE {16}
225.~ Identified electron acceptor (developer)

DEFINITION

Classification: 503/225

Identified electron acceptor (developer):

(under subclass 200) Subject matter in which a claim names a material which has acid characteristics sufficient to bring out the color of a color-former contacted therewith.