Patents by Inventor Andreas Kirst

Andreas Kirst 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).

  • Polyacetal molding compositions and their use
    Patent number: 5416152
    Abstract: A polyacetal molding composition comprising, as the active additive, at least onea) ester of long-chain monocarboxylic acids (C.sub.22 to C.sub.34) with mono- or polyhydric alcohols (C.sub.2 to C.sub.8), in the presence or absence of alkali metal and/or alkaline earth metal salts of the carboxylic acids mentioned, and/orb) polyethylene wax, is distinguished by a reduced tendency toward melt fracture. Such molding compositions can advantageously be employed in the production of shaped articles which show no undesirable defects in the surface.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: May 16, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dietrich Fleischer, Andreas Kirst, Klaus Kohlhepp, Hans-Dieter Sabel