Patents by Inventor Cesare Verdi

Cesare Verdi 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).

  • Patent number: 4695531
    Abstract: A light-sensitive silver halide element for radiographic use with intensifying screens has coated on at least one side of a transparent base at least a spectrally sensitized silver halide emulsion layer and, coated between the base and a silver halide emulsion layer, a hydrophilic colloid layer containing a water-soluble acid dye capable of being decolorized during the photographic processing, said dye having its absorption in a region of the electromagnetic spectrum corresponding to the spectral sensitivity of the silver halide emulsion, associated with a basic polymeric mordant which comprises repeating units of formula: ##STR1## wherein R.sub.1 is hydrogen or a methyl group, A is a --COO-- or --COO--alkylene group, R.sub.2 is hydrogen or a lower alkyl group and X is an anion.The invention allows the use of low coverage weights of silver halide light-sensitive elements and provides x-ray images with a favorable image quality and sensitivity ratio.
    Type: Grant
    Filed: July 17, 1986
    Date of Patent: September 22, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gerolamo Delfino, Simone Franco, Cesare Verdi