US PATENT SUBCLASS 430 / 474
.~.~.~ Pyrazolone coupler

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

449  DF  NONRADIATION SENSITIVE IMAGE PROCESSING COMPOSITIONS OR PROCESS OF MAKING {7}
464  DF  .~ Developer {10}
470  DF  .~.~ Coupler containing {6}
474.~.~.~ Pyrazolone coupler

DEFINITION

Classification: 430/474

Pyrazolone coupler:

(under subclass 470) Compositions wherein the coupler contains the structure [figure]