Patents by Inventor Udo Kräuter

Udo Kräuter 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).

  • Reduction- and oxidation-stable iron oxide black pigments having high colour strength for colouring plastics and building materials, their preparation and their use
    Patent number: 7235127
    Abstract: The present invention relates to reduction- and oxidation-stable iron oxide black pigments having high color strength, the preparation thereof and the use thereof.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: June 26, 2007
    Assignee: LANXESS Deutschland GmbH
    Inventors: Herbert Kunstmann, Udo Kräuter, Carsten Rosenhahn, Hans-Josef Moringen
  • Method and device for producing globular grains of high-puroty silicon having a diameter of between 50 ?m and 300 ?m and use of the same
    Patent number: 6951637
    Abstract: The invention relates to a method and a device for producing globular grains of high-purity silicon by atomising a silicon melt (6) in an ultrasonic field (10). Globular grains having a grain size of 50 ?m can be produced by means of said method and device and can be used to separate high-purity silicon from silane in the fluid bed. The silicon melt (6) is fed into the ultrasonic field (10) at a distance of <50 mm in relation to a field node, and the atomised silicon leaves the ultrasonic field (10) at a temperature close to the liquidus point. The invention also relates to a use of the product produced according to the inventive method or using the inventive device, as particles for producing high-purity silicon from silane in a fluid bed.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: October 4, 2005
    Assignee: SolarWorld Aktiengesellschaft
    Inventors: Hans-Dieter Block, Udo Kräuter, Peter Schreckenberg
  • Method of measuring particle sizes
    Patent number: 6587200
    Abstract: The invention relates to a process for measuring particle size by measuring the attenuation of radiation after its passage through a defined measuring section containing a disperse system. According to the invention the temporally fluctuating transmission signal is recorded with variable time or spatial resolution. The transmission signals recorded then undergo a non-linear operation. The result of that non-linear operation is represented and analyzed as a spectral curve, i.e., as a function of the spatial or temporal resolution.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: July 1, 2003
    Inventors: Ulrich Riebel, Udo Kraeuter