Patents by Inventor Ezio Astengo

Ezio Astengo 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).

  • Silver bromoiodide core-shell grain emulsion
    Patent number: 6258522
    Abstract: The present invention relates to a light-sensitive emulsion, and a light-sensitive photographic material containing the same, comprising silver bromoiodide grains of a core shell structure comprising a) an inner core consisting essentially of silver bromide or silver bromoiodide, the silver iodide content of said inner core being within the range of 0 to 10 mole %, and b) a plurality of shells consisting essentially of silver bromide or silver bromoiodide, wherein a pure silver iodide phase representing from 0.1 to 5 mole % of the total silver halide grain content is interposed between two adjacent shells, and wherein at least one of said adjacent shells has a silver iodide content higher than 5 mole %.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: July 10, 2001
    Assignee: Ferrania S.p.A.
    Inventors: Mario Mariotti, Stefania Ghirardo, Giuseppe Rocca, Mauro Avidano, Alessandro Gunnella, Ezio Astengo