Patents by Inventor Timothy Hannigan

Timothy Hannigan 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).

  • Photopolymerizable, negative working, peel developable, single sheet color proofing system
    Patent number: 5294515
    Abstract: This invention relates to negative working photopolymerizable sheet constructions 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 accurately predict the image quality from a lithographic printing process. Image development is by peel apart processing.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: March 15, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Wojciech A. Wilczak, Timothy Hannigan