US PATENT SUBCLASS 430 / 475
.~.~.~ Open-chain keto methylene 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}
475.~.~.~ Open-chain keto methylene coupler

DEFINITION

Classification: 430/475

Open-chain keto methylene coupler:

(under subclass 470) Compositions wherein the coupler contains the -CH2 C- structure.