Patents by Inventor Norbert Freisler

Norbert Freisler 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).

  • Polyethylene composition for injection molding
    Patent number: 5658992
    Abstract: Polyethylene compositions, which can be processed by injection molding, comprising 40% to 99% of a polyethylene having a limiting viscosity number of 1000 to 5000 ml/g and 60% to 1% of a polyethylene having a limiting viscosity number of 100 to 700 ml/g. The molecular weight distribution of each of the polyethylene components is less than 9. The limiting viscosity number of the compositions is at least 1500 ml/g. Shaped articles produced from these compositions have excellent wear resistance, high notched impact strength, and do not delaminate.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: August 19, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jens Ehlers, Norbert Freisler, Hermann van Laak