The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2000
Filed:
Mar. 19, 1998
Peter Bell, Koln, DE;
Hans-Ulrich Borst, Elsdorf, DE;
Ralf Buscher, Lohmar, DE;
Jorg Siegel, Koln, DE;
Agfa Gevaert N.V., , BE;
Abstract
A multi-layer color photographic recording material having at least one photosensitive silver halide emulsion layer containing a color coupler contains in at least one photosensitive silver halide emulsion layer a non-diffusing, 2-equivalent color coupler which, under chromogenic development conditions, by coupling with a color developer oxidation product, releases a photographically inert ballast group from the coupling site and so forms a dye removable by rinsing which makes no contribution to color density. In a preferred embodiment of the invention, the non-diffusing, 2-equivalent color coupler which, under chromogenic development conditions, by coupling with a color developer oxidation product, releases a photographically inert ballast group from the coupling site and so forms a dye removable by rinsing which makes no contribution to color density, is a cyan coupler, for example a naphtholic or phenolic coupler, which is preferably located in the most highly sensitive sub-layer of a green-sensitive silver halide emulsion layer unit consisting of two or more sub-layers. The material exhibits an improved sensitivity/grain or gradation/grain relationship.