Patents by Inventor Harmut Hensel

Harmut Hensel 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).

  • Oriented plastic film having specific surface topography
    Patent number: 4746703
    Abstract: This invention relates to a biaxially or multi-axially oriented, heat set film, which has on its surface numerous unevenesses, which comprise indentations around a protrusion. The protrusions comprise crosslinked or hardened organic particles having an average particle size of from 0.01 to 5.0 microns and having a narrow particle size distribution. The film surface has a mean surface roughness value Ra of from 0.005 to 0.10 micron.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: May 24, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hermann Dallmann, Walter Seifried, Werner Schaefer, Siegfried Janocha, Harmut Hensel