Patents by Inventor Karlheinz Berndt

Karlheinz Berndt 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 for physically converting PTFE particles to fibers
    Patent number: 6187238
    Abstract: A fiber material of PTFE and, optionally, hydrophilizing additives, for use in the production of diaphragms for the electrolysis of alkali chlorides, as well as for filter layers. The fiber material comprises fiber bundles and these, in turn, comprise individual microfibrils, there being irregularly shaped interstices between the microfibrils. The fiber material is produced in that a PTFE dispersion, consisting of a salt solution with PTFE particles and, optionally, hydrophilizing additives, is treated in a hot gas/vapor stream in a fluidized bed apparatus charged with inert solids. The method permits the fiber material to be produced also in larger quantities in an economic manner.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: February 13, 2001
    Assignees: Magdeburger Energie-und Umwelttechnik GmbH, De Nora Deutschland GmbH
    Inventors: Bruno Klatt, Manfred Horx, Hartmut Koelling, Karlheinz Berndt, Gerhard Krueger, Hans-Joachim Kuenne, Lothar Moerl, Lothar Backhauss
  • PTFE fibre material and process for making it
    Patent number: 5700572
    Abstract: The invention provides a fiber material of PTFE and, optionally, hydrophilizing additives, for use in the production of diaphragms for the electrolysis of alkali chlorides, as well as for filter layers. The fiber material comprises fiber bundles and these, in turn, comprise individual microfibrils, there being irregularly shaped interstices between the microfibrils. The fiber material is produced in that a PTFE dispersion, consisting of a salt solution with PTFE particles and, optionally, hydrophilizing additives, is treated in a hot gas/vapor stream in a fluidized bed apparatus charged with inert solids. The method permits the fiber material to be produced also in larger quantities in an economic manner.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: December 23, 1997
    Assignees: Heraeus Elektrochemie GmbH, Magdeburger Energie - und Umwelttechnik GmbH
    Inventors: Bruno Klatt, Manfred Horx, Hartmut Koelling, Karlheinz Berndt, Gerhard Krueger, Hans-Joachim Kuenne, Lothar Moerl, Lothar Backhauss