Patents by Inventor Lothar Hoppenstein

Lothar Hoppenstein 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).

  • Peelable, heat-sealable, multilayered polyolefin film, process for the production thereof, and the use thereof
    Patent number: 5997968
    Abstract: A multilayer polyolefin film comprising of at least three coextruded layers comprising an opaque base layer, an intermediate layer, and an outer peelable surface layer composed of two incompatible polyolefins, wherein the intermediate layer contains at least 80% by weight of a polyolefin having a lower melting point or lower glass transition temperature than the polyolefin forming the base layer.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: December 7, 1999
    Assignee: Hoechst Trespaphan GmbH
    Inventors: Thomas Dries, Lothar Hoppenstein, Adolf Wilhelm