Patents by Inventor Daniel N. Vivona

Daniel N. Vivona 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).

  • Imaging compositions and methods
    Patent number: 4232083
    Abstract: Color-forming precursor compositions comprising a metal-complexing compound having a plurality of ligand groups and color-activating compositions comprising transition metal salts of oleophilic, organic acids are combined to form dark, permanent images on substrates. The methods and compositions are particularly useful for providing permanent fingerprints and other dermographs.
    Type: Grant
    Filed: July 22, 1975
    Date of Patent: November 4, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Donald D. Buerkley, Norman P. Sweeny, Daniel N. Vivona