Patents by Inventor Werner Ballas

Werner Ballas 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).

  • Thermoplastic polycarbonate moulding compositions with flame-resistant properties
    Patent number: 5240978
    Abstract: A flame resistant molding composition containing a polycarbonate resin, a graft polymer and, as a flame retarding agent a phosphoric acid ester of novolak in combination with an anti drip agent is disclosed. The composition may further contain a thermoplastic copolymer and/or polyalkylene terephthalate. A process for the preparation of the composition is also disclosed.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: August 31, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Jochen Schoeps, Horst Peters, Werner Ballas
  • Flame-resistant thermoplastic polycarbonate molding compounds
    Patent number: 5137953
    Abstract: The invention relates to thermoplastic molding compounds containing thermoplastic aromatic polycarbonates, thermoplastic copolymers, optionally graft polymers and/or tetrafluoroethylene polymers and/or silicone resins, characterized in that they contain phosphorus compounds corresponding to formula (I) ##STR1## in which R is a --CH.sub.2 --, ##STR2## group and the aromatic radicals may even be alkyl-substituted.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: August 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Jochen Schoeps, Horst Peters, Werner Ballas
  • Flame-resistant thermoplastic polycarbonate molding compounds
    Patent number: 4988748
    Abstract: The invention relates to thermoplastic polycarbonate molding compounds containing polycarbonates, copolymers, phosphorus compounds, tetrafluoroethylene polymers and, optionally, graft polymers and also further additives and other thermoplastics and also stabilizers, pigments, flow aids, mold release agents, antistatic agents and/or other flameproffing agents, characterized in that they contain as phosphorus compounds those corresponding to formula (I) ##STR1## and to a process for the production of the polycarbonate molding compounds.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: January 29, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Hans-Dieter Block, Bernd Urbanneck, Werner Ballas