Patents by Inventor Gerhard Stegmeier

Gerhard Stegmeier 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).

  • Sealable, biaxially stretched polypropylene film having high scratch resistance, and process for its manufacture
    Patent number: 4460631
    Abstract: Disclosed is a sealable, biaxially stretched polyethylene-coated polypropylene film, preferably manufactured as a flat film, which is not only extremely scratch-resistant but is also rapidly sealable, with good machine-running characteristics and high transparency. The polyethylene sealing layer has a scratch resistance of .ltoreq.50% gloss reduction, relative to an initial gloss of 100%, measured according to ASTM Standard Specification D673-70 (1976), and a density of .gtoreq.0.94 g/cm.sup.3, preferably of .gtoreq.0.95 g/cm.sup.3. Also disclosed is a process for the manufacture of the film, and the use of the film as an abrasion-resistant packaging material.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: July 17, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Stegmeier, Siegfried Janocha, Hartmut Hensel