Patents by Inventor Otto Kirchner

Otto Kirchner 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).

  • Multi-layer plastic conduit comprising a PVC layer
    Publication number: 20050170119
    Abstract: Exemplary embodiments of the invention provide a plastic conduit or pipe having a free conduit cross-section, in particular for accommodating feeds, the free conduit cross section including multiple layers, wherein a first layer is formed from PVC, a second layer is made of a polymer and a bonding agent layer is arranged between the first and second layers.
    Type: Application
    Filed: October 29, 2004
    Publication date: August 4, 2005
    Inventors: Helmut Kirchner, Otto Kirchner