Patents by Inventor Bernfried Kalthof

Bernfried Kalthof 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 FOR PRODUCING PLASTIC RODS
    Publication number: 20120232531
    Abstract: A process for producing a plastic rod, in particular round rods, suitable for machining is provided. The process includes extruding a plastic profile of a first plastic molding composition which forms the outermost layer of the plastic rod, and inserting a second plastic molding composition as a rod core into the profile within a calibrator downstream of the extruder. The first plastic molding composition contains at least 50% by weight of a semicrystalline thermoplastic and the first plastics moulding composition has the following properties: a) crystallite melting point Tm in accordance with ISO 11357 of at least 170° C., b) crystallization temperature Tk in accordance with ISO 11357 of at most 70 K below T. and c) enthalpy of fusion AH in accordance with ISO 11357 of at least 20 J/g.
    Type: Application
    Filed: February 15, 2012
    Publication date: September 13, 2012
    Applicant: Evonik Degussa GmbH
    Inventors: Rainer Goering, Markus Hartmann, Karl Kuhmann, Bernfried Kalthof
  • Method for producing plastic rods
    Patent number: 7968027
    Abstract: The invention relates to a method for extruding round rods from transparent plastics such as for example polymethylmethacrylate (PMMA), polycarbonate (PC) or polyethylene (PET) and to a method for producing said round rods.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: June 28, 2011
    Assignee: Evonik Roehm GmbH
    Inventors: Bernfried Kalthof, Holger Lorenz, Satilmis Yilmaz
  • Method for producing plastic rods
    Publication number: 20070108669
    Abstract: The invention relates to a method for extruding round rods from transparent plastics such as for example polymethylmethacrylate (PMMA), polycarbonate (PC) or polyethylene (PET) and to a method for producing said round rods.
    Type: Application
    Filed: January 13, 2005
    Publication date: May 17, 2007
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Bernfried Kalthof, Holger Lorenz, Satilmis Yilmaz