Patents by Inventor Karl H. Roemer

Karl H. Roemer 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).

  • Production of magnetic recording media
    Patent number: 4551359
    Abstract: Magnetic recording media possessing a thin magnetic layer are produced by dispersing finely divided magnetically anisotropic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying a layer of the dispersion to a non-magnetizable base by means of a knife-coater, then, if required, orienting the magnetically anisotropic material by means of a magnetic field and drying the applied layer, a high molecular weight organic compound which acts as a thickener being added to the magnetic dispersion.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: November 5, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: August Lehner, Joachim Hack, Karl Krucker, Werner Balz, Karl H. Roemer, Peter Rudolf, Roland Falk, Guenter Eckert