US PATENT SUBCLASS 503 / 216
.~ Identified organic electron acceptor (developer) other than phenolic resin

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}
216.~ Identified organic electron acceptor (developer) other than phenolic resin {1}
217  DF  .~.~> And identified color-former

DEFINITION

Classification: 503/216

Identified organic electron acceptor (developer) other than phenolic resin:

(under subclass 200) Subject matter in which a claim names an organic material (other than a synthetic resin made from a mixture which includes phenol) which organic material has

acid characteristics sufficient to bring out the color of a color-former contacted therewith.