Patents by Inventor Douglas J. Kiserow

Douglas J. Kiserow 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).

  • Hydrogenation of polymers in the presence of supercritical carbon dioxide
    Patent number: 7408009
    Abstract: A method of hydrogenating a polymer comprises: (a) providing a dense phase, the dense phase comprising a polymer in a solvent; (b) providing a catalyst system, the catalyst system comprising as least one metal hydrogenation catalyst (preferably including nickel or ruthenium); and (c) providing a light phase, the light phase comprising, consisting of or consisting essentially of hydrogen and carbon dioxide; and (d) contacting the dense phase, the light phase and the catalyst system under conditions in which the hydrogen reacts with the polymer and hydrogenates the polymer.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: August 5, 2008
    Assignee: North Carolina State University
    Inventors: George W. Roberts, Dawei Xu, Douglas J. Kiserow, Ruben G. Carbonell