Patents by Inventor Guenter Mattern

Guenter Mattern 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).

  • Production of filler-containing thermoplastic molding compositions and molding compositions obtainable in this way
    Patent number: 5659009
    Abstract: In a process for producing filler-containing thermoplastic molding compositions by mixing fillers with thermoplastics in the melt,a) the fillers are mixed in a mixing apparatus in the melt with a low molecular weight thermoplastic having a melt viscosity of at most 30 Pas (measured at 20.degree. C. above the melting point of the thermoplastic compound and at a shear gradient of 1,000 s.sup.-1),b) the product thus obtained is removed from the mixing apparatus, cooled and comminuted, andc) the comminuted product is then subjected in the solid phase to a post-condensation.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: August 19, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Gunter Pipper, Walter Goetz, Claus Cordes, Josef Georg Floss, Guenter Mattern, Peter Hildenbrand, James Hurley, Karl Schlichting, Graham Edmund McKee, Gerd Blinne