Patents by Inventor Roller Hermann

Roller Hermann 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).

  • Magnetic recording media comprising a polyurethane binder resin containing perfluoro groups
    Patent number: 5169721
    Abstract: Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a polyurethane binder, not less than 50% by weight of the binder consisting of a high molecular weight branched polyurethane elastomer having OH-containing urea groups at the chain ends, and the frictional properties of the binder being improved and its coefficient of friction reduced by incorporation of perfluoro groups.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: December 8, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Bobrich, August Lehner, Albert Kohl, Rudolf Suettinger, Uwe Keppeler, Werner Lenz, Roller Hermann, Helmut Kopke, Guenther Schulz