Patents by Inventor Keith J. Kauffman

Keith J. Kauffman 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).

  • Producing blown film and blends from bimodal high density high molecular weight film resin using magnesium oxide-supported Ziegler catalyst
    Patent number: 5284613
    Abstract: A blend for blown film which exhibits improved MD/TD tear balance. The blend is a bimodal molecular weight ethylene resin containing two fractions of different molecular weight. The weight fraction of a higher molecular weight component of the blend is about 0.35 to 0.75.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: February 8, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Ahmed H. Ali, John T. T. Hsieh, Keith J. Kauffman, Yury V. Kissin, S. Christine Ong, Giyarpuram N. Prasad, Ann L. Pruden, Sandra D. Schregenberger