Patents by Inventor Herbert Steinmetzer

Herbert Steinmetzer 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 working additive into polymers, particularly polymers which can be foamed
    Patent number: 4153762
    Abstract: The invention relates to a process for working additives into polymers, in which a mixture of thermoplastics with additives is heated to a temperature sufficient for the melting process, with the possible introduction of an expanding agent into the melt in which the expanding agent is homogenized, the melt being cooled if necessary to a temperature at which it can be extruded in the form of a foam plastic, the additives being adsorbed on a polymer flocculent matrix having a sufficient specific area, due to having a density of up to 0.6 g/cm.sup.3 and 15 to 99% of open foam cells and being of the same or different polymer composition as the basic polymer.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: May 8, 1979
    Assignee: VEB Leuna-Werke "Walter Ulbricht"
    Inventors: Werner Lauterberg, Herbert Steinmetzer, Brigitte Weber, Dieter Haack, Werner Taube