Patents by Inventor Stephan J. Platzer

Stephan J. Platzer 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).

  • Photosensitive compositions having mixtures of alkoxy and non-alkoxy diazonium salt containing compounds
    Patent number: 6861196
    Abstract: The present invention includes an imageable element, which can be: (a) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; a polyvinyl acetal binder; and a sheet substrate; or (b) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; and a sheet substrate. The imaging layer includes a total aromatic diazonium salt containing compound content of at least 10 weight percent. The molar ratio of the aromatic diazonium salt containing compound having an alkoxy substituent to the aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1. Upon imagewise exposure and development, an imaged element is obtained.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: March 1, 2005
    Assignee: Kodak Polychrome Graphics LLC
    Inventors: Stephan J. Platzer, Maria T. Sypek, Paul Perron, Harald Baumann, Melinda Alden
  • Photosensitive compositions having mixtures of alkoxy and non-alkoxy diazonium salt containing compounds
    Publication number: 20040063022
    Abstract: The present invention includes an imageable element, which can be: (a) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; a polyvinyl acetal binder; and a sheet substrate; or (b) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; and a sheet substrate. The imaging layer includes a total aromatic diazonium salt containing compound content of at least 10 weight percent. The molar ratio of the aromatic diazonium salt containing compound having an alkoxy substituent to the aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1. Upon imagewise exposure and development, an imaged element is obtained.
    Type: Application
    Filed: September 17, 2003
    Publication date: April 1, 2004
    Applicant: Kodak Polychrome Graphics, LLC.
    Inventors: Stephan J. Platzer, Maria T. Sypek, Paul Perron, Harald Baumann, Melinda Alden
  • Photosensitive compositions having mixtures of alkoxy and non-alkoxy diazonium salt containing compounds
    Patent number: 6638679
    Abstract: The present invention includes an imageable element, which can be: (a) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; a polyvinyl acetal binder; and a sheet substrate; or (b) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; and a sheet substrate. The imaging layer includes a total aromatic diazonium salt containing compound content of at least 10 weight percent. The molar ratio of the aromatic diazonium salt containing compound having an alkoxy substituent to the aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: October 28, 2003
    Assignee: Kodak Polychrome Graphics, LLC
    Inventors: Stephan J. Platzer, Maria T. Sypek, Paul Perron, Harald Baumann, Melinda Alden
  • Photosensitive compositions having mixtures of alkoxy and non-alkoxy diazonium salt containing compounds
    Publication number: 20030013035
    Abstract: The present invention includes an imageable element, which can be: (a) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; a polyvinyl acetal binder; and a sheet substrate; or (b) an imageable element comprising an imaging layer which comprises: an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent; and a sheet substrate. The imaging layer includes a total aromatic diazonium salt containing compound content of at least 10 weight percent. The molar ratio of the aromatic diazonium salt containing compound having an alkoxy substituent to the aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Applicant: Kodak Polychrome Graphics, L.L.C.
    Inventors: Stephan J. Platzer, Maria T. Sypek, Paul Perron, Harald Baumann, Melinda Alden
  • Negative working diazo color proofing method
    Patent number: 4751166
    Abstract: This invention relates to negative photosensitized sheet contructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: June 14, 1988
    Assignee: Hoechst Celanese Corp.
    Inventors: Stephan J. Platzer, Gabor I. Koletar
  • Aluminum support useful for lithography
    Patent number: 4581996
    Abstract: An improved substrate suitable for use as a base for a lithographic printing plate, especially a plate useful for the production of continuous tone images. The substrate is produced by extremely uniformly graining an aluminum sheet which has a highly polished, mirror-like surface.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: April 15, 1986
    Assignee: American Hoechst Corporation
    Inventor: Stephan J. Platzer
  • Method for producing an aluminum support useful for lithography
    Patent number: 4427500
    Abstract: An improved substrate suitable for use as a base for a lithographic printing plate, especially a plate useful for the production of continuous tone images. The substrate is produced by extremely uniformly graining an aluminum sheet which has a highly polished, mirror-like surface.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: January 24, 1984
    Assignee: American Hoechst Corporation
    Inventor: Stephan J. Platzer