Patents by Inventor Siegfried Kuphal

Siegfried Kuphal 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).

  • Method for electrophoretically immersion-enameling substrates that have edges
    Patent number: 6736950
    Abstract: Method of electro-dipcoating while reducing edge migration on stoving by 1) electro-deposition of a coating layer from an electrically depositable coating composition containing a heat-curable binder system having a content of olefinically unsaturated double bonds that are radically polymerisable under UV irradiation, on an electrically conductive substrate having edges, 2) UV irradiation of at least part of the electrically deposited coating layer, avoiding complete curing, 3) complete curing of the electrically deposited coating layer by stoving.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: May 18, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Klausjörg Klein, Walter Kühhiri, Siegfried Kuphal