Patents by Inventor Marcel Jacob Monbaliu

Marcel Jacob Monbaliu 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).

  • Photographic material containing 3-anilino-5-pyrazolylalkylcarbonate or arylcarbonate couplers
    Patent number: 4062683
    Abstract: 3-Anilino-5-pyrazolyl alkylcarbonates and arylcarbonates are described for use in silver halide color photography as color coupler precursor compounds containing no active methylene group so that they do not take part in undesirable side-reactions before color development.
    Type: Grant
    Filed: May 27, 1976
    Date of Patent: December 13, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Marcel Jacob Monbaliu, Raphael Karel Van Poucke, Roger Henri Vrydaghs, Hans-Heinrich Credner, Ernst Meier
  • Photographic material containing 2-acyl-2-pyrazolin-5-on-couplers
    Patent number: 4061498
    Abstract: 2-Acyl-3-pyrazolin-5-one couplers are provided for use in color photography which upon color development form 2-pyrazolin-5-one couplers capable of coupling with the oxidation products of the color developing agent.
    Type: Grant
    Filed: May 27, 1976
    Date of Patent: December 6, 1977
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Marcel Jacob Monbaliu, Marc Godfried Mannens, Raphael Karel Van Poucke, Hans-Heinrich Credner, Ernst Meier
  • Preparation of 4-methyl-2-pyrazolin-5-ones
    Patent number: 4000156
    Abstract: A method is described for the preparation of a 1-substituted 4-methyl-2-pyrazolin-5-one by catalytic hydrogenation under pressure and simultaneous methylation by means of paraformaldehyde of the appropriate 1-substituted 2-pyrazolin-5-one in a medium of an inert organic solvent comprising ammonium acetate.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: December 28, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Marcel Jacob Monbaliu, Walter Puschel, Raphael Karel Van Poucke