Patents by Inventor Siegfried Welker

Siegfried Welker 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).

  • Method and device for producing nanoparticles
    Patent number: 7736553
    Abstract: The invention relates to processes for producing nanoparticles, especially pigment particles, comprising the following steps: i) bringing a base substance (1) into the gas phase, ii) generating particles by cooling or reacting the gaseous base substance (1), and iii) applying electrical charge to the particles during particle generation in step ii) in a nanoparticle generation apparatus. The invention further relates to apparatus for producing nanoparticles, having a feed line (28) for transporting the gas stream (29) into the apparatus, a particle generation and charging area for substantially simultaneous generation and charging of nanoparticles, and a takeoff line (30) for transporting the charged nanoparticles from the particle generation and charging area.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: June 15, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Joerg Halpap, Richard Van Gelder, Bernd Sachweh, Siegfried Welker, Norbert Wagner, Andreas Marquard, Gerhard Kasper
  • Method and Device for Producing Nanoparticles
    Publication number: 20070262482
    Abstract: The invention relates to processes for producing nanoparticles, especially pigment particles, comprising the following steps: i) bringing a base substance (1) into the gas phase, ii) generating particles by cooling or reacting the gaseous base substance (1), and iii) applying electrical charge to the particles during particle generation in step ii) in a nanoparticle generation apparatus. The invention further relates to apparatus for producing nanoparticles, having a feed line (28) for transporting the gas stream (29) into the apparatus, a particle generation and charging area for substantially simultaneous generation and charging of nanoparticles, and a takeoff line (30) for transporting the charged nanoparticles from the particle generation and charging area.
    Type: Application
    Filed: July 8, 2005
    Publication date: November 15, 2007
    Inventors: Jorg Halpap, Richard Van Gelder, Bernd Sachweh, Siegfried Welker, Norbert Wagner, Andreas Marquard, Gerhard Kasper