US PATENT SUBCLASS 430 / 219
.~.~.~.~.~ Silver halide developing retarder or antifoggant

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

199  DF  TRANSFER PROCEDURE BETWEEN IMAGE AND IMAGE LAYER, IMAGE RECEIVING LAYERS, OR ELEMENT CONTAINING AN IMAGE RECEIVING LAYER OR AN INGREDIENT FOR FORMING AN IMAGE RECEIVING LAYER {3}
202  DF  .~ Diffusion transfer process, element, or identified image receiving layers therefor {8}
211  DF  .~.~ Element or identified image receiving layers for dye image formation {1}
212  DF  .~.~.~ Element containing silver salt sensitizer or either element or image receiving layer for use therewith {8}
218  DF  .~.~.~.~ Identified nondye image forming developing agent, silver halide development accelerator or retarder, or dye image forming accelerator or retarder containing {1}
219.~.~.~.~.~ Silver halide developing retarder or antifoggant

DEFINITION

Classification: 430/219

Silver halide developing retarder or antifoggant:

(under subclass 218) Subject matter containing an ingredient functioning to retard the development of exposed silver halide or an ingredient which retards or prevents the formation of fog in a radiation-sensitive layer.

(1) Note. For purposes of this subclass, fog is defined as the formation of silver density in areas of the radiation sensitive silver halide layer not imagewise exposed to radiation.