Patents by Inventor Peter Franklin Erhardt

Peter Franklin Erhardt 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).

  • Fixing powder images
    Patent number: 3950168
    Abstract: A method is given for fixing powder images to substrates whereby the powder image is subjected to internal stress and, thereafter, exposed to vapors containing a solvent for the powder image.
    Type: Grant
    Filed: February 26, 1973
    Date of Patent: April 13, 1976
    Assignee: Xerox Corporation
    Inventors: Peter Franklin Erhardt, William Conrad Richards, John Michael Pochan