Patents Examined by L. X. Falasco
  • Patent number: 4004926
    Abstract: A method of producing a colored image by developing a latent silver image obtained by the image-wise photo-exposure of a photosensitive silver halide material, wherein the development is carried out with p-phenylenediamine corresponding to the following general formula: ##STR1## wherein: EACH OF R'.sub.1, R'.sub.2, R'.sub.3, and R'.sub.4 (same or different) represents an alkyl group, in the presence of1. a hydrazone compound having the following general formula: ##STR2## wherein: N IS 1, 2, OR 3,R.sub.1 is hydrogen or an acyl group, andR.sub.2 is a --CONH.sub.2 group or a --SO.sub.2 X group, wherein X represents a hydroxyl group, an amino group, an aliphatic group, an aryl group or an heterocyclic group,R.sub.3 is an alkyl group or an aryl group, andZ represents the necessary atoms to close a nitrogen-containing heterocyclic nucleus, and2. a color coupler of the phenol, naphthol, or active methylene compound series.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: January 25, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Jozef Frans Willems, Wilhelmus Janssens
  • Patent number: 3957493
    Abstract: A thermodevelopable light-sensitive material having a reduced frequency to fog formation by heat, comprising a support and at least one layer containing (a) an organic silver salt, (b) a catalytic amount of a light-sensitive silver halide or a compound capable of forming a light-sensitive silver halide by reaction with the organic silver salt (a), (c) a reducing agent (d) a binder, and (e) an N-haloacetamide. In order to increase the transparency of the thermodevelopable photographic layer of the material and the density of the image and to improve its preservability, a topcoating of polymer can be formed on the light-sensitive layer.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: May 18, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takao Masuda, Keiichi Adachi