Patents by Inventor Gunther Priepke

Gunther Priepke 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).

  • Process for the continuous production of high molecular weight polyethylene terephthalate
    Patent number: 4064112
    Abstract: This invention relates to a process for the continuous production of high molecular weight polyethylene terephthalate by polycondensation in the solid phase wherein granulated, dried polyethylene terephthalate, having an intrinsic viscosity of at least 0.15, is first crystallized and is thereafter subjected to solid state polycondensation.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: December 20, 1977
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Hans Joachim Rothe, Helmut Heinze, Brian D. Whitehead, Gunther Priepke