Patents by Inventor Bernd Pirstadt

Bernd Pirstadt 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).

  • Process and device for producing microspheres
    Patent number: 5500162
    Abstract: A process and device are disclosed for producing microspheres by vibration-provoked dripping of a liquid through a nozzle plate (12) provided with several openings (14). In order to be able to produce spheres having up to 5 mm size, the same amount of liquid per unit of time drips through each opening (14) of the nozzle plate (12). The falling drops (18) form an envelope surrounded from all sides by flowing reaction gas. The reaction gas is introduced inside or outside the envelope and sucked away inside or outside the envelope.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: March 19, 1996
    Assignee: Nukem GmbH
    Inventors: Wolfgang Theisen, Edwin Brauneis, Bernd Pirstadt
  • Process and plant for the production of spherical alginate pellets
    Patent number: 5472648
    Abstract: Proposed is a process for the production of spherical alginate pellets from drops of alginate solution delivered by a nozzle, the drops being solidified by dropping them into an ionic solution and subsequently removing the pellets and rinsing them. The alginate solution is converted into drops by vibrational stimuli, and the drops subsequently allowed to remain substantially free in the ionic solution until the required degree of solidification has been reached.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: December 5, 1995
    Assignee: Nukem GmbH
    Inventors: Gerhard Alisch, Edwin Brauneis, Bernd Pirstadt, Norbert Iffland, Egbert Brandau