Patents by Inventor Hans L. Schroder

Hans L. Schroder 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).

  • Flexographic printing reliefs having increased flexibility
    Patent number: 5472824
    Abstract: Photosensitive composition comprising, inter alia, thermoplastic-elastomer block copolymer binders and addition-polymerizable monomer having terminal ethylenically unsaturated end groups wherein at least one monomer has one acrylate or methacrylate group, said monomer forms a homopolymer having a solubility parameter in the range between 7.6 and 9.6 and a glass transition temperature below 0.degree. C. and, further wherein, at least one monomer has more than one acrylate or methacrylate groups, said monomer forms a homopolymer having a solubility parameter in the range between 9.6 and 12.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: December 5, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Manfred Schober, Hans L. Schroder
  • Process for the cementing of photopolymerizable flexographic printing elements or printing plates
    Patent number: 4758500
    Abstract: A process is described for cementing together the edges of photopolymerizable flexographic printing elements for printing plates that contain as an elastomeric binder a block copolymer whose polymer blocks are polystyrene and polyisoprene and/or polybutadiene or their copolymers.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: July 19, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Manfred Schober, Hans L. Schroder
  • Process for the ozone protection by photopolymer-flexoprinting plates by alcohol-soluble polyamides
    Patent number: 4640877
    Abstract: A process for the ozone protection of photopolymer flexographic printing plates using alcohol soluble polyamides, which are applied onto the exposed and developed surface of the flexographic printing plate in a mixed solution comprising n-propanol and n-butanol, e.g., 10 to 90% and 90 to 10% by weight, respectively.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: February 3, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Hans L. Schroder