Patents by Inventor Harry Copeland

Harry Copeland 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).

  • Post exposure method for enhancing durability of negative working lithographic plates
    Publication number: 20030118944
    Abstract: The durability of negative working lithographic plates is enhanced by post-exposure to a wavelength, or a range of wavelengths, effective to promote further addition polymerization and/or cross-linking reactions. Preferably, the electromagnetic energy used for post-exposure comprises a principal wave length not greater than 300 nanometers.
    Type: Application
    Filed: March 27, 2002
    Publication date: June 26, 2003
    Applicant: Western Litho Plate & Supply Co.
    Inventors: Harry Copeland, Charles J. Kramer, David C. Madoux, William J. Streeter