Patents by Inventor Ronald Michael Josef Hofstra

Ronald Michael Josef Hofstra 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).

  • Toner coated with conductive polymer
    Patent number: 6495301
    Abstract: A toner comprising separate toner particles each of which comprises a fixable core, the core being provided with a conductive surface layer containing a doped electrically conductive polymer and an intermediate layer, particularly a polymer-containing intermediate layer disposed between the surface layer and the core.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: December 17, 2002
    Assignee: Oce-Technologies B.V.
    Inventors: Marcel Dialma Everaars, Ronald Michael Josef Hofstra, Peter Maria Cornelis Zeelen, Huibert Cornelis Kwint
  • Toner coated with conductive polymer
    Publication number: 20010031416
    Abstract: A toner comprising separate toner particles each of which comprises a fixable core, the core being provided with a conductive surface layer containing a doped electrically conductive polymer and an intermediate layer, particularly a polymer-containing intermediate layer disposed between the surface layer and the core.
    Type: Application
    Filed: March 16, 2001
    Publication date: October 18, 2001
    Inventors: Marcel Dialma Everaars, Ronald Michael Josef Hofstra, Peter Maria Cornelis Zeelen, Huibert Cornelis Kwint