Patents by Inventor Thomas Sprengart

Thomas Sprengart 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).

  • Device for producing a dental workpiece
    Patent number: 9060831
    Abstract: The invention includes a support frame for producing a dental workpiece. The frame has a Z axis and comprising wall sections defining a hole that extends along the Z axis through the frame. At least one of the wall sections comprises an adhesive-directing surface extending along the Z axis in a non-parallel relationship. Such a configuration provides optimized methods for affixing a blank to the support frame and optimized properties of the blank after fixation to the support frame.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: June 23, 2015
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Sebastian Guggenmos, Michael A. Kraemer, Michael K. Schaaf, Stefan Hoescheler, Thomas Sprengart, Martin Goetzinger
  • Dental blank and method of making a dental ceramic blank
    Patent number: 8425812
    Abstract: A method of making a dental blank comprises the steps of independently compacting a first and second zone of a quantity of ceramic particles. During compacting, the first and second zones have different compaction factors in at least one stage. Such blanks may be pre-sintered and used in the manufacture of dental restorations. The method may help in controlling the homogeneity of the material structure during manufacturing the blanks.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: April 23, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Ingo W. Wagner, Martin Goetzinger, Thomas Sprengart
  • DENTAL BLANK AND METHOD OF MAKING A DENTAL CERAMIC BLANK
    Publication number: 20100209876
    Abstract: A method of making a dental blank comprises the steps of independently compacting a first and second zone of a quantity of ceramic particles. During compacting, the first and second zones have different compaction factors in at least one stage. Such blanks may be pre-sintered and used in the manufacture of dental restorations. The method may help in controlling the homogeneity of the material structure during manufacturing the blanks.
    Type: Application
    Filed: October 10, 2008
    Publication date: August 19, 2010
    Inventors: Ingo W. Wagner, Martin Goetzinger, Thomas Sprengart
  • System and method for manufacturing dental prostheses
    Patent number: 7708560
    Abstract: The present invention is related to systems and methods for manufacturing dental prostheses, such as bridges and crowns. In particular, the present invention is directed to novel methods for managing machining jobs for manufacturing dental prostheses in a system having a plurality of machining devices.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: May 4, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Michael A. Kraemer, Michael K. Schaaf, Thomas Sprengart
  • DEVICE FOR PRODUCING A DENTAL WORKPIECE
    Publication number: 20100000677
    Abstract: The invention includes a support frame for producing a dental workpiece. The frame has a Z axis and comprising wall sections defining a hole that extends along the Z axis through the frame. At least one of the wall sections comprises an adhesive-directing surface extending along the Z axis in a non-parallel relationship. Such a configuration provides optimized methods for affixing a blank to the support frame and optimized properties of the blank after fixation to the support frame.
    Type: Application
    Filed: February 4, 2008
    Publication date: January 7, 2010
    Inventors: Sebastian Guggenmos, Michael A. Kraemer, Michael K. Schaaf, Stefan Hoescheler, Thomas Sprengart, Martin Goetzinger
  • Method for producing dentures
    Patent number: 7431545
    Abstract: The invention relates to a method for producing dentures by milling a workpiece. The inventive method is characterized in that in the event of a change in the load on the workpiece or on the milling tool, or on the workpiece and on the milling tool, determined before the milling begins and occurring during the milling, the relative speed between the milling tool and the workplace is varied without using a regulation technique.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: October 7, 2008
    Assignee: 3M ESPE AG
    Inventors: Daniel Suttor, Thomas Sprengart, Michael Schaaf, Guenter Hertlein
  • System and method for manufacturing dental prostheses
    Publication number: 20060111806
    Abstract: The present invention is related to systems and methods for manufacturing dental prostheses, such as bridges and crowns. In particular, the present invention is directed to novel methods for managing machining jobs for manufacturing dental prostheses in a system having a plurality of machining devices.
    Type: Application
    Filed: November 21, 2005
    Publication date: May 25, 2006
    Inventors: Michael Kraemer, Michael Schaaf, Thomas Sprengart
  • Method for producing dentures
    Publication number: 20050019121
    Abstract: The invention relates to a method for producing dentures by milling a workpiece. The inventive method is characterized in that in the event of a change in the load on the workpiece or on the milling tool, or on the workpiece and on the milling tool, determined before the milling begins and occurring during the milling, the relative speed between the milling tool and the workplace is varied without using a regulation technique.
    Type: Application
    Filed: November 14, 2002
    Publication date: January 27, 2005
    Inventors: Daniel Suttor, Thomas Sprengart, Michael Schaaf, Guenter Hertlein
  • Frame containing ceramic block for producing dental crowns and bridges
    Patent number: D627472
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: November 16, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Ingo W. Wagner, Martin Goetzinger, Thomas Sprengart
  • Frame containing ceramic block for producing dental crowns and bridges
    Patent number: D627473
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: November 16, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Ingo W. Wagner, Martin Goetzinger, Thomas Sprengart
  • Frame containing ceramic block for producing dental crowns and bridges
    Patent number: D627889
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: November 23, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Ingo W. Wagner, Martin Goetzinger, Thomas Sprengart