US PATENT SUBCLASS 430 / 378
.~.~.~.~ Direct positive process

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

357  DF  COLOR IMAGING PROCESS {11}
374  DF  .~ Using identified radiation sensitive composition in the formation of color image {1}
375  DF  .~.~ Silver compound sensitizer {3}
376  DF  .~.~.~ And coupler {9}
378.~.~.~.~ Direct positive process {1}
379  DF  .~.~.~.~.~> Reversal process

DEFINITION

Classification: 430/378

Direct positive process:

(under subclass 376) Processes for producing a direct positive color image. Included herein are processes involving radiation sensitive silver compound compositions which form direct positive images on exposure and development which images are used in the formation of color images. The unexposed portions rather than the exposed portions are developed during initial development. Also, processes involving couplers which react with oxidized developer in the exposed areas to form colorless products and which are oxidized in unexposed regions to form color images.

SEE OR SEARCH THIS CLASS, SUBCLASS:

359, for the direct positive color image which is used for color correction.

379, for positive color images formed by reversal processing.

547, for compositions used in the process of this subclass.