Patents by Inventor Krasimir Chorbadzhiev

Krasimir Chorbadzhiev 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 composition with low yellowing under UV-light and sunlight exposure
    Patent number: 7309550
    Abstract: This disclosure relates to a photosensitive composition useful in preparing water-developable, relief printing plates and other photosensitive articles. The compositions comprise an unsaturated polyurethane pre-polymer, which is the reaction product of at least one polyether diol, at least one aliphatic diisocyanate, at least one hydroxyl-functionalized mono-, di- and tri-(meth)acrylate, and a particular photoinitiator. The resulting photosensitive resin compositions have reduced rates and levels of yellowing if subjected to additional UV-light or sunlight after processing.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 18, 2007
    Assignee: Chemence, Inc.
    Inventors: Joe F. Rach, Krasimir Chorbadzhiev
  • Photosensitive composition with low yellowing under UV-light and sunlight exposure
    Publication number: 20070099119
    Abstract: This disclosure relates to a photosensitive composition useful in preparing water-developable, relief printing plates and other photosensitive articles. The compositions comprise an unsaturated polyurethane pre-polymer, which is the reaction product of at least one polyether diol, at least one aliphatic diisocyanate, at least one hydroxyl-functionalized mono-, di- and tri-(meth)acrylate, and a particular photoinitiator. The resulting photosensitive resin compositions have reduced rates and levels of yellowing if subjected to additional UV-light or sunlight after processing.
    Type: Application
    Filed: December 22, 2006
    Publication date: May 3, 2007
    Inventors: Joe Rach, Krasimir Chorbadzhiev