Patents by Inventor Richard Guenthner

Richard Guenthner 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 photo-graphic materials
    Patent number: 5098821
    Abstract: Light-sensitive silver halide photographic materials comprising a support base and one or more hydrophilic colloid layers, at least one of which is a silver halide emulsion layer, at least one of said hydrophilic colloid layers of said photographic materials containing both a) a non-ionic surface active agent having a polyoxyethylene group and b) a fluorinated organic compound, characterized by the fact that said fluorinated organic compound is the reaction product of a polyoxyalkyleneamine compound and a fluorinated organic acid compound.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: March 24, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Elio Cavallo, Richard Guenthner, Renzo Torterolo