Patents by Inventor Otto Diroll

Otto Diroll 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: 5230955
    Abstract: Thermoplastically re-formable plastic sheets with flameproofing means, characterized by a core layer 1-10 mm thick comprised of polyether sulfone or a similar thermoplastic, which core material has a content of at least 0.5 wt. %, preferably at least 2 wt. %, of a flame-protective additive, such as boron trioxide; and said sheet or plate further characterized by outer layers, firmly adhering to and covering the two faces of the core layer, at least 0.05 mm thick and comprised of a thermoplastic having a lower proportional content of the flame-protective additives than the core layer; are particularly useful for interior structures in passenger conveyances, such as airplanes.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: July 27, 1993
    Assignees: Rohm GmbH Chemische Fabrik, BASF Aktiengesellschaft
    Inventors: Otto Diroll, Klaus Hofmann, Uwe Jacobsen, Hans Lorenz, Gunther Schreyer, Peter R. Szigeti, Hermann Buchert, Wolfgang Eberle, Gerhard Heinz, Eckhard Koch