US PATENT SUBCLASS 430 / 554
.~.~.~.~ 2-pyrazolin-5-one coupler


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

495.1  DF  RADIATION SENSITIVE PRODUCT {7}
541  DF  .~ Identified radiation sensitive composition with color producing substance {1}
542  DF  .~.~ Silver compound sensitizer {2}
543  DF  .~.~.~ Coupler containing {12}
554.~.~.~.~ 2-pyrazolin-5-one coupler {1}
555  DF  .~.~.~.~.~> Substituted at coupling position with other than hydrogen


DEFINITION

Classification: 430/554

2-pyrazolin-5-one coupler:

(under subclass 543) Compounds containing a coupler in the form of 2-pyrazolin 5-one.

SEE OR SEARCH THIS CLASS, SUBCLASS:

386, for process involving exposed composition of this subclass.

449, for nonradiation sensitive compositions applied to exposed compositions of this subclass.