Patents by Inventor John H. Choi

John H. Choi 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).

  • Process for preparing a precolored image using photosensitive reproduction element containing a photorelease layer
    Patent number: 5028511
    Abstract: This invention relates to a peel-apart photosensitive element comprising a strippable coversheet, a photorelease layer, a photohardenable layer, an elastomeric layer, and a support, which is useful in a variety of image reproduction processes.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: July 2, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John H. Choi
  • Multi-layer peel-apart photosensitive reproduction element containing a photorelease layer
    Patent number: 5001036
    Abstract: This invention relates to a peel-apart photosensitive element comprising a strippable coversheet, a photorelease layer, a photohardenable layer, an elastomeric layer, and a support, which is useful in a variety of image reproduction processes.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: March 19, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John H. Choi