Patents by Inventor Joannes Verheijen

Joannes Verheijen 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).

  • Photographic material comprising a copolyester support
    Patent number: 5411843
    Abstract: A photographic material comprising at least one silver halide emulsion layer and a copolyester support-said copolyester comprising polyether group(s) in the side chain is disclosed.Preferably the copolyester is prepared by copolycondesing diol moieties that comprise a polyether group substituted with a sulfonic acid group in acid or salt form into the copolyester.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: May 2, 1995
    Assignee: AGFA-Gevaert, N.V.
    Inventors: August Marien, Marc Stevens, Joannes Verheijen