Patents by Inventor Armand M. Van den Bergh

Armand M. Van den Bergh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Organic compounds for use in a dye diffusion transfer process and photographic elements incorporating them
    Patent number: 5037731
    Abstract: A ballasted non-diffusing compound that is capable of releasing a diffusible particularly light-fast azo dye from a carrier moiety, characterized in that said compound corresponds to the following general formula:CAR--L--G--Dwherein:CAR represents a ballasted carrier moiety making said compound non-diffusing in a hydrophilic colloid medium under wet alkaline conditions,L represents a chemical group cleavable or releasable from the carrier moiety as a function of a redox-reaction or argentolytic reaction taking place in the development of a silver halide emulsion layer under alkaline conditions;G represents a bivalent organic group containing at least one aromatic nucleus being substituted with a R.sup.5 R.sup.6 NSO.sub.2 NH-group, wherein R.sup.5 and R.sup.6 (same or different) represent hydrogen, an alkyl group including a substituted alkyl group or an aryl group including a substituted aryl group, andD is an azo dye part chemically linked to an aromatic nucleus of G.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: August 6, 1991
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Hans Vetter, Christian C. Van de Sande, Luc J. Vanmaele, Armand M. Van den Bergh, Wilhelmus Janssens
  • Non-diffusing compounds capable of releasing a diffusible dye or dye precursor compound with multiple dye units
    Patent number: 4663273
    Abstract: 1.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: May 5, 1987
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Christian C. Van de Sande, Armand M. Van den Bergh, Andre Verhecken
  • Ballasted dye compounds with linkages containing three aromatic nuclei for use in a dye diffusion transfer process and element
    Patent number: 4605613
    Abstract: Photographic silver halide emulsion material for use in a dye diffusion transfer process incorporating a non-diffusing compound capable of releasing a diffusible mono-azo dye or dye precursor thereof from a carrier moiety, said compound corresponding to the following general formula (I):(I) CAR--L--G--Dwherein:CAR represents a ballasted carrier moiety,L represents a chemical group cleavable or releasable from the carrier moiety as a function of a redox-reaction or argentolytic reaction taking place in the development of a silver halide emulsion layer under alkaline conditions,G represents a bivalent organic group incorporating at least three aromatic nuclei, selected from the group consisting of homocyclic or heterocyclic aromatic nuclei, with the provisions that L is linked to one end nucleus and that D is linked to the other end nucleus of said bivalent organic group; said linking being by means of a direct bond or by means of a bivalent mono- or polyatomic group, andD is an azo dye part linked to said othe
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: August 12, 1986
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Christian C. Van de Sande, Armand M. Van den Bergh, Wilhelmus Janssens, Hans Vetter
  • Azo dye releasing compounds with hydrolytic removable group for dye diffusion transfer process
    Patent number: 4483915
    Abstract: A photographic silver halide material comprises a shifted dye compound capable of releasing a dye moiety, characterized in that said compound corresponds in reduced state to general formula (1) and in oxidized state to general formula (2):A.sup.1 --L--P (1)A.sup.2 --L--P (2)wherein:A.sup.1 represents a hydroquinonyl group including a substituted hydroquinonyl group, or such group forming part of a fused ring system,A.sup.2 represents a quinonyl group including a substituted quinonyl group, or such group forming part of a fused ring system,L represents a bivalent group which undergoes a cleavage under hydrolytic alkaline conditions when the compound is in reduced state corresponding to formula (1),P represents an organic dye moiety incorporating an azo chromophoric group --N.dbd.
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: November 20, 1984
    Assignee: Agfa-Gevaert, N. V.
    Inventors: Christian C. Van de Sande, Armand M. Van den Bergh, Wilhelmus Janssens