Patents by Inventor Detlef Schuhmann

Detlef Schuhmann 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).

  • Biaxially oriented polypropylene film having improved migration values
    Patent number: 6063483
    Abstract: A biaxially oriented polypropylene film is described. The base ply of the film contains at least 90% by weight of a polypropylene prepared by means of a metallocene catalyst. This polypropylene is distinguished by a mean isotactic block length of greater than 40, an n-heptane soluble fraction of less than 1% and a ratio of the weight average molecular weight M.sub.w to the number average molecular weight M.sub.n of less than 4.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: May 16, 2000
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Peiffer, Detlef Busch, Thomas Dries, Gunter Schlogl, Andreas Winter, Detlef Schuhmann