Patents by Inventor Marcel Andre de Kler

Marcel Andre de Kler 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).

  • Investment Composition Materials Having a Reducing Agent
    Publication number: 20130187302
    Abstract: An investment composition comprising a reducing agent containing carbon.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Inventors: Tsadok Tsadok Hai, Bastiaan Phillip Van Dijk, Marcel André De Kler
  • Aesthetic ceramic veneered restoration
    Patent number: 7988448
    Abstract: The present invention relates to an aesthetic dental restoration having a layered structure, which dental restoration has the appearance of a natural tooth. In addition, the present invention relates to a method for preparing such dental restorations. Particularly, the invention is based on the control of interaction between opalescence and fluorescence.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: August 2, 2011
    Assignee: Dentsply International, Inc.
    Inventors: Joseph Maria van der Zel, Petrus Gerardus Appelman, Eric Marinus Hermanus Cornelissen, Marcel Andre de Kler, Jurgen Gebhardt
  • Aesthetic ceramic veneered restoration
    Publication number: 20100015574
    Abstract: The present invention relates to an aesthetic dental restoration having a layered structure, which dental restoration has the appearance of a natural tooth. In addition, the present invention relates to a method for preparing such dental restorations. Particularly, the invention is based on the control of interaction between opalescence and fluorescence.
    Type: Application
    Filed: April 2, 2009
    Publication date: January 21, 2010
    Inventors: Joseph Maria van der Zel, Petrus Gerardus Appleman, Eric Marinus Hermanus Cornelissen, Marcel Andre de Kler, Jurgen Gebhardt
  • Strengthened ceramic restoration
    Publication number: 20090004630
    Abstract: The present invention relates to a process for the preparation of a full-ceramic dental restoration, comprising heat pressing of a tooth coloured pressing glass on a fully or partially supporting structure of yttria doped tetragonal zirconia (YTZP), comprised of yttria doped tetragonal zirconia ceramic having a grain size, as measured by the linear intercept method, of less than 0.6 ?m, wherein the pressing glass has a thermal expansion coefficient (TEC) of between 9.0 and 11.0 ?m/m.K (measured in the range of from 25 to 500° C.) and wherein the pressing glass has a pressing temperature of between 750 and 1200° C. In a further aspect, the invention relates to a full-ceramic dental restoration, comprising a fully or partially supporting structure of yttria doped tetragonal zirconia (YTZP) and a heat pressed tooth coloured pressing glass, which restoration is modeled to be in occlusal contact with opposing teeth and in mesio-distal contact with neighbouring teeth.
    Type: Application
    Filed: January 14, 2008
    Publication date: January 1, 2009
    Inventors: Joseph Maria van der Zel, Jan Slor, Theodorus Jacobus Grinwis, Marcel Andre de Kler, Tsadok Tsadok Hai, Peter Kreuder