Patents by Inventor Claudio Giampieri

Claudio Giampieri 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).

  • Color contrast radiographic film
    Patent number: 4212936
    Abstract: A photographic element having at least two silver halide emulsion layers, one layer containing a colorless cyan-forming coupler which produces a negative image and the other layer containing a colored coupler which upon color development with a p-phenylene diamine developer produces a positive dye image of contrasting color to cyan, will produce a color contrast radiographic picture after exposure and development.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: July 15, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Claudio Giampieri