Patents by Inventor Ralf Tuellmann

Ralf Tuellmann 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).

  • Use of a polyamide molding compound for lining conduits
    Patent number: 8574697
    Abstract: In a method for the introduction of an inliner into a pipe or a pipeline, where the external diameter of the inliner is greater than the internal diameter of the pipe or of the pipeline, and where the action of an external force is used to reduce the cross section of the inliner prior to the introduction, the inliner is composed of a polyamide moulding composition which comprises at least 50% by weight of polyamide which is not PA11. The recovery behavior of said polyamides is similar to that of polyethylene usually used for this purpose.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: November 5, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Andreas Dowe, Ralf Tuellmann, Reinhard Beuth, Franz-Erich Baumann
  • USE OF A POLYAMIDE MOLDING COMPOUND FOR LINING CONDUITS
    Publication number: 20100300573
    Abstract: In a method for the introduction of an inliner into a pipe or a pipeline, where the external diameter of the inliner is greater than the internal diameter of the pipe or of the pipeline, and where the action of an external force is used to reduce the cross section of the inliner prior to the introduction, the inliner is composed of a polyamide moulding composition which comprises at least 50% by weight of polyamide which is not PA11. The recovery behaviour of said polyamides is similar to that of polyethylene usually used for this purpose.
    Type: Application
    Filed: September 30, 2008
    Publication date: December 2, 2010
    Applicant: Evonik Degussa Gmbh
    Inventors: Andreas Dowe, Ralf Tuellmann, Reinhard Beuth, Franz-Erich Baumann