Patents by Inventor Bernd Brandt

Bernd Brandt 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).

  • Patent number: 4807819
    Abstract: Finely divided powdery materials such as, e.g., precipitated silica are granulated by means of two rolls, one of which has a filter surface and the other has a profiled covering, in which the shafts of these rolls are arranged vertically one above the other and the finely divided powdery material is introduced into the gap between the rolls by means of at least one feed screw.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: February 28, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Alfons Kreher, Werner Nagel, Bernd Brandt, Albert Peters
  • Patent number: 4238322
    Abstract: A silicic acid filter cake and suspension agent are fed to a container equipped with a stirrer having a peripheral speed of about 20-30 m/sec. The ratio of container diameter to stirrer diameter is about 3:1. The ratio of container diameter to level of filling is a maximum of about 1:2. The container contains at least about 1.5 to about 2 kg of silicic acid suspension, for each 1 kg of silicic acid filter cake which is added to the container. The contents of the container is mixed while maintaining a pH of at most about 4. A portion of the resulting silicic acid suspension is drawn off from the zone of highest turbulence in the container. An apparatus for carrying out the process is provided.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: December 9, 1980
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Bernd Brandt, Peter Nauroth, Albert Peters, Helmut Reinhardt
  • Patent number: 4224295
    Abstract: A finely divided silicic acid having a pH>6 is prepared by spray drying, in the presence of a base or basic-reacting substance, a highly concentrated silicic acid suspension having excess, unwanted acidity.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: September 23, 1980
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Bernd Brandt, Peter Nauroth, Albert Peters, Helmut Reinhardt
  • Patent number: 4094771
    Abstract: A silicic acid filter cake and suspension agent are fed to a container equipped with a stirrer having a peripheral speed of about 20-30 m/sec. The ratio of container diameter to stirrer diameter is about 3:1. The ratio of container diameter to level of filling is at most about 1:2. The container contains at least about 1.5 to about 2 kg of silicic acid suspension, for each 1 kg of silicic acid filter cake which is added to the container. The contents of the container is mixed while maintaining a pH of at most about 4. A portion of the resulting silicic acid suspension is drawn off from the zone of highest turbulence in the container.
    Type: Grant
    Filed: January 13, 1976
    Date of Patent: June 13, 1978
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Bernd Brandt, Peter Nauroth, Albert Peters, Helmut Reinhardt
  • Patent number: 4045881
    Abstract: Air is vented from steam-charged heating pipes of a tubular rotary dryer via connector pipes and a collecting pipe which is disposed circumferentially around the dryer drum. Holding blocks provided with inwardly-biased rollers support the collecting pipe for longitudinal movement on the exterior wall of the dryer drum.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: September 6, 1977
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Bernd Brandt, Peter Jansen, Heinz Liesenfeld