US PATENT SUBCLASS 430 / 151
.~.~ Heat development

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

141  DF  DIAZO REPRODUCTION, PROCESS, COMPOSITION, OR PRODUCT {7}
146  DF  .~ Diazo-type process, i.e., producing dye image by reacting the diazo or the imaged reaction product of the diazo {5}
151.~.~ Heat development

DEFINITION

Classification: 430/151

Heat development:

(under subclass 146) Processes wherein the dye image is formed by the application of heat. Usually the dye components are brought together with the heat, or the heat catalyzes a dye forming reaction such as by producing a coupler or a basic ingredient such as ammonia.