Patents by Inventor Matthias H. Ludwig

Matthias H. Ludwig 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).

  • Methods for altering the magnetic properties of materials and the materials produced by these methods
    Patent number: 6469605
    Abstract: The present invention pertains to methods for altering the magnetic properties of materials and the novel materials produced by these methods. The methods of this invention concern the application of high voltage, high frequency sparks to the surface of materials in order to alter the magnetic properties of the materials. Specially, the present invention can be applied to diamagnetic silicon to produce ferromagnetic spark-processed silicon.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: October 22, 2002
    Assignee: University of Florida
    Inventors: Jonathan A. Hack, Rolf E. Hummel, Matthias H. Ludwig
  • Methods for altering the magnetic properties of materials and the materials produced by these methods
    Publication number: 20020003383
    Abstract: The present invention pertains to methods for altering the magnetic properties of materials and the novel materials produced by these methods. The methods of this invention concern the application of high voltage, high frequency sparks to the surface of materials in order to alter the magnetic properties of the materials. Specially, the present invention can be applied to diamagnetic silicon to produce ferromagnetic spark-processed silicon.
    Type: Application
    Filed: June 1, 2001
    Publication date: January 10, 2002
    Inventors: Jonathan A. Hack, Rolf E. Hummel, Matthias H. Ludwig
  • Methods for altering the magnetic properties of materials and the materials produced by these methods
    Patent number: 6264801
    Abstract: The present invention pertains to methods for altering the magnetic properties of materials and the novel materials produced by these methods. The methods of this invention concern the application of high voltage, high frequency sparks to the surface of materials in order to alter the magnetic properties of the materials. Specially, the present invention can be applied to diamagnetic silicon to produce ferromagnetic spark-processed silicon.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: July 24, 2001
    Assignee: University of Florida
    Inventors: Jonathan A. Hack, Rolf E. Hummel, Matthias H. Ludwig
  • Methods for altering the magnetic properties of materials and the materials produced by these methods
    Patent number: 6113746
    Abstract: Methods for altering the magnetic properties of materials and the novel materials produced by these methods. The methods concern the application of high voltage, high frequency sparks to the surface of materials in order to alter the magnetic properties of the materials. Specificaly this method can be applied to diamagnetic silicon to produce ferromagnetic spark-processed silicon.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: September 5, 2000
    Assignee: University of Florida
    Inventors: Jonathan A. Hack, Rolf E. Hummel, Matthias H. Ludwig
  • Method of manufacturing photoluminescing semiconductor material using lasers
    Patent number: 5597621
    Abstract: A method for the manufacture of a photoluminescing layer on a normally non-photoluminescing semiconductor substrate, such as a porous silicon layer created on a silicon substrate, by treating the surface of the substrate with a relatively high energy, pulsed laser beam.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: January 28, 1997
    Assignee: University of Florida
    Inventors: Rolf E. Hummel, Matthias H. Ludwig, Martin Vala