Patents by Inventor Bruce A. Zellmer

Bruce A. Zellmer 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).

  • Image deletion fluid for printing plate
    Patent number: 4746597
    Abstract: An image deletion fluid for printing plates which use a silver image as an ink-receptive area. The deletion fluid comprises iodine and an effective excess of iodide ion, which form a triiodide complex, and a hydrophilic-matrix-forming agent. In a preferred embodiment, the deletion fluid further comprises an organic, preferably polar, solvent. The deletion fluid is applied to the surface of the plate, rubbed briefly and allowed to dry there, with no removal or rinsing away of the deletion fluid or by-products required.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: May 24, 1988
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Bruce A. Zellmer, David R. Boston