Patents by Inventor Dieter Witmann

Dieter Witmann 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).

  • Polycarbonate molding compounds stable to light ageing
    Patent number: 5552465
    Abstract: Polycarbonate molding compositions resistant to light aging and exhibiting an improved notched impact strength are disclosed. The compositions which are based on an aromatic polycarbonate, aromatic polyester carbonate or a polyester, contain a redox-catalyzed graft polymer of resin-forming monomers on a rubber, a phosphorus compound and a fluorinated polyolefin.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: September 3, 1996
    Assignee: Bayer Atkiengesellschaft
    Inventors: Dieter Witmann, Jochen Schoeps, Bernd Urbanneck, Karl Huff, Karl-Heinz Ott, Horst Peters