Patents by Inventor Franz Koeppl

Franz Koeppl 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: 6375011
    Abstract: A method for conveying silicon fragments has the silicon fragments being conveyed over a conveyor surface, which is made from hyperpure silicon. There is a vibrating conveyor, and during the conveying, the sharp edges of the silicon fragments are rounded and mechanical-physical decontamination takes place. The vibrating conveyor has a conveyor surface which is made from hyperpure silicon. A second vibrating conveyor unit has a conveyor surface which is made from hyperpure silicon and has passage openings therethrough.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: April 23, 2002
    Assignee: Wacker-Chemie GmbH
    Inventors: Dirk Flottmann, Franz Köppl, Matthäus Schantz, Friedrich Steudten
  • Patent number: 5464159
    Abstract: Bodies of hyperpure semiconductor material can be reduced in size without ntamination by being subjected to shock waves. The method is preferably carried out at room temperature, so that diffusion into the interior of the semiconductor, which is induced and/or accelerated by high temperatures, is largely avoided for superficially adsorbed foreign particles. The shock waves are generated in a focal point of a semiellipsoidal reflector by electrical discharge between two electrodes.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: November 7, 1995
    Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
    Inventors: Andreas Wolf, Franz Koeppl