US PATENT SUBCLASS 430 / 481
.~.~.~.~ And hydroquinone

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}
478  DF  .~.~ Plural developer agents containing {3}
480  DF  .~.~.~ Heterocyclic developer {1}
481.~.~.~.~ And hydroquinone

DEFINITION

Classification: 430/481

And hydroquinone:

(under subclass 480) Compositions containing dihydroxybenzene or substituted p-dihydroxy benzene.