Patents by Inventor John G. Buzzell

John G. Buzzell 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).

  • Positive-working color proofing film and process
    Patent number: 4849322
    Abstract: Photopolymer positive surprint color proofing film based on epoxy acrylate monomer exhibits low dot gain, low time dependence of toning and good tonal range. Binder can be methylmethacrylate/ethyl acrylate/acrylic acid copolymer, preferably cross-linked with zinc ions and plasticized with a second acrylate monomer and a mixture of triacetin and trimethylol propane.
    Type: Grant
    Filed: January 6, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Richard D. Bauer, John G. Buzzell, Rusty E. Koenigkramer
  • Positive-working color proofing film and process
    Patent number: 4734356
    Abstract: Photopolymer positive surprint color proofing film based on epoxy acrylate monomer exhibits low dot gain, low time dependence of toning and good tonal range. Binder can be methylmethacrylate/ethyl acrylate/acrylic acid copolymer, preferably crosslinked with zinc ions and plasticized with a second acrylate monomer and a mixture of triacetin and trimethylol propane.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: March 29, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard D. Bauer, John G. Buzzell, Rusty E. Koenigkramer
  • Photoimaging process for forming multicolor images
    Patent number: 4356253
    Abstract: Improved process for forming multicolor proofs by laminating to a receptor a positive-working photopolymer element having an electrical discharge treated polyethylene terephthalate support bearing a photopolymerizable layer containing a monomeric component of or mixture of monomeric components as defined; a compatible polymeric acrylate binder and optionally a polyvinyl acetate binder, the weight ratio of polyvinyl acetate to acrylate binder being less than 4 to 3, and an initiator or initiator system; exposing the layer imagewise; removing the support, applying and distributing colorant, removing the colorant in the exposed areas and repeating the steps at least once with another photopolymer element, the lamination being to the previously laminated element.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: October 26, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John G. Buzzell