Patents by Inventor John Lawrence Stoffel

John Lawrence Stoffel 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).

  • Process for alleviating bleed and improving color in printed elements
    Patent number: 5801738
    Abstract: A process for alleviating bleed and improving color in printed elements comprises applying an anionic printing liquid and a cationic printing liquid to a substrate adjacent to one another, wherein at least one of the printing liquids contains a polymer and reacting the anionic and cationic printing liquids with one another; wherein the color integrity of the anionic and cationic printing liquids is maintained.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: September 1, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Lawrence Stoffel, Arthur Charles Shor, Harry Joseph Spinelli, Sheau-Hwa Ma, Howard Matrick, Mark Leland Choy, Loren Eugene Johnson