Patents by Inventor Joerg Hellman

Joerg Hellman 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).

  • Multilayer, biaxially oriented polyester film, process for its production and its use as a magnetic tape film without a backing coating
    Publication number: 20010055674
    Abstract: The invention relates to a three-layer, biaxially oriented polyester film which has very good electromagnetic properties compared with films of the prior art in combination with improved abrasion properties. The film is composed of at least one base layer B and outer layers A and C applied to both sides of this base layer, these outer layers having a defined number of protuberances with a defined height and having a defined gas flow in the roughness profile. The invention furthermore relates to a process for the production of the film and its use as magnetic tape film in which no backing coating is applied.
    Type: Application
    Filed: June 29, 2001
    Publication date: December 27, 2001
    Inventors: Joerg Hellman, Wolfram Goerlitz, Herbert Peiffer, Helmut Czepl, Andreas Stopp