Patents by Inventor Herbert Franz Wollak

Herbert Franz Wollak 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).

  • Thermoplastic film for packaging
    Patent number: 6572979
    Abstract: A thermoplastic shrinkable film consisting of two or more layers, including, at least, (a) a layer of a polyolefin, (b) a layer of a blend of a polyolefin and an ionomer is disclosed. Optionally, the film contains (c) a further layer of a polyolefin, in which case layer (b) is positioned between layers (a) and (c). Films according to this invention demonstrate omnidirectional tearability, good clarity and strength and are cost competitive with other films on the market.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: June 3, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Herbert Franz Wollak, Bernard Rioux