Patents by Inventor Wolfgang J. Siebourg

Wolfgang J. Siebourg 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).

  • Foamable molding compositions
    Patent number: 4737523
    Abstract: Foamable, thermoplastic molding composition exhibiting an improved level of impact resistance is provided. The composition, which is suitable for the preparation of expanded molded parts, comprise a thermoplastic resin, preferably at least one selected from a group consisting of polycarbonate, polyalkylene terephthalate, aromatic polyester and polyester carbonate, a nucleating agent, a chemical blowing agent and an anhydride. It was unexpectedly found that the composition is suitable for the molding of articles having an improved level of impact resistance.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: April 12, 1988
    Assignee: Mobay Corporation
    Inventors: Roger J. White, Sivaram Krishnan, Wolfgang J. Siebourg