Patents by Inventor Jan Willem Frederik VAN Ingen

Jan Willem Frederik VAN Ingen 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 fixing process
    Patent number: 3954471
    Abstract: In an image recording process, a radiation sensitive film comprising a photo-reducible compound is exposed to radiation and subsequently is contacted with a fixing agent capable of being reduced by the reduction product of the photo-reducible compound, with the production of an insoluble coloured material.
    Type: Grant
    Filed: September 12, 1974
    Date of Patent: May 4, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Timothy Douglas Andrews, Glyn David Short, Jan Willem Frederik VAN Ingen