Patents by Inventor John A. Hearson

John A. Hearson 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).

  • Direct positive lithographic plate
    Patent number: 6420087
    Abstract: A positive working lithographic plate precursor comprising a support having a hydrophilic surface and a coating thereon comprising a positive working, photosensitive composition and an aryl alkyl polysiloxane. A method of preparing a positive working lithographic plate precursor comprising coating on a support having a hydrophilic surface a coating comprising, in admixture, a positive working photosensitive composition and an aryl alkyl polysiloxane.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: July 16, 2002
    Assignee: Kodak Polychrome Graphics LLC
    Inventors: Peter A. R. Bennett, John A. Hearson, Carole-Anne Smith