US PATENT SUBCLASS 205 / 55
.~.~ Heterocyclic color-forming material

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

52  DF  ELECTROLYTIC MARKING OR COMPOSITION THEREFOR {2}
54  DF  .~ Utilizing organic color-forming material {2}
55.~.~ Heterocyclic color-forming material

DEFINITION

Classification: 205/55

Heterocyclic color-forming material:

(under subclass 54) Subject matter wherein the organic color-forming material contains a heterocyclic ring.