Patents by Inventor Walter Bertramini

Walter Bertramini 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).

  • Light-sensitive silver halide color photographic elements containing surfactants with a combined HLB greater than 20
    Patent number: 5356768
    Abstract: Light-sensitive silver halide color photographic elements comprising a silver halide photographic emulsion layer including a) at least one 2,5-diacylamino phenol cyan coupler dissolved in low-boiling water-immiscible organic solvent droplets dispersed in said emulsion layer in reactive association with at least one non-ionic surfactant compound having a HLB higher than 20 and at least one anionic surfactant compound and b) at least one cationic carbocyanine spectral sensitizing dye.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: October 18, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Walter Bertramini, Agostino Baldassarri