Patents by Inventor Ivo Zullo

Ivo Zullo 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 element having improved sensitometry and mechanical resistance
    Patent number: 6664038
    Abstract: A silver halide emulsion which comprises silver halide grains dispersed in a hydrophilic colloid mixture comprising from 5% to 25% by weight of dextran, from 20% to 40% by weight of hydrogenated poly-saccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin. A fore-hardened photographic material comprising such an emulsion and the use of such an emulsion in a photographic material increases the sensitometry and mechanical resistance of such a photographic material.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: December 16, 2003
    Assignee: Ferrania, S.p.A.
    Inventors: Luca Ceruti, Eva Genesio, Gianluigi Molinari, Ivo Zullo
  • Photographic element having improved sensitometry and mechanical resistance
    Publication number: 20030099911
    Abstract: A silver halide emulsion which comprises silver halide grains dispersed in a hydrophilic colloid mixture comprising from 5% to 25% by weight of dextran, from 20% to 40% by weight of hydrogenated poly-saccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin. A fore-hardened photographic material comprising such an emulsion and the use of such an emulsion in a photographic material increases the sensitometry and mechanical resistance of such a photographic material.
    Type: Application
    Filed: September 27, 2002
    Publication date: May 29, 2003
    Applicant: Ferrania, S.p.A.
    Inventors: Luca Ceruti, Eva Genesio, Gianluigi Molinari, Ivo Zullo
  • Ageing improvements of photographic elements comprising dextran
    Patent number: 5609986
    Abstract: The present invention relates to a process for improving the ageing properties of a silver halide photographic element, free of photolytically generated latent images, comprising a support bearing at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer, the silver halide light-sensitive emulsion layer including negative acting surface latent image-type silver halide grain in association with a contrast promoting agent and a hydrazine compound, by adding a total amount of at least 0.40 grams per square meter of dextran to at least said light-sensitive silver halide emulsion layer and/or to at least said light-insensitive layer.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: March 11, 1997
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Rino Feduzi, Cristina Soncini, Antonella Celada, Salvatore Selvaggio, Ivo Zullo