Patents by Inventor Karsten F. Keidel

Karsten F. Keidel 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).

  • Method for producing waterproof seams
    Patent number: 7685666
    Abstract: Method for sealing seams in shoes having an exterior upper with a lower end, an interior upper with a lower end, an insole with a circumferential edge, and a sole, the lower end of the exterior upper, the lower end of the interior upper, and the outer edge of the insole being sewn together, characterized in that a tape is selected that is provided on both sides with a layer that is adhesive at room temperature, and that this tape is used to join and fix the lower end of the exterior upper to the lower end of the interior upper before the exterior upper, interior upper, and insole are sewn together.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: March 30, 2010
    Assignee: Sympatex Technologies GmbH
    Inventors: Karsten F. Keidel, Liviu M. Pavalescu, Paul E. Raith
  • Method for manufacturing a waterproof shoe structure and shoe structure produced by said method
    Patent number: 6823551
    Abstract: A method for manufacturing a shoe structure including an exterior upper sewn at a lower end of the exterior upper lower end to an insole and an interior upper including a waterproof, water-vapour permeable functional layer and a lining, the interior upper having in the region of the sole, an inwardly folded end portion which is connected in a waterproof manner to the insole and has a perimetral edge enclosing an opening.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: November 30, 2004
    Assignee: Sympatex Technologies GmbH
    Inventors: Karsten F. Keidel, Liviu-Mihai Pavelescu, Paul E. Raith
  • Method for manufacturing a waterproof shoe structure and shoe structure produced by said method
    Publication number: 20030163880
    Abstract: A method for manufacturing a shoe structure including an exterior upper sewn at a lower end of the exterior upper lower end to an insole and an interior upper including a waterproof, water-vapour permeable functional layer and a lining, the interior upper having in the region of the sole, an inwardly folded end portion which is connected in a waterproof manner to the insole and has a perimetral edge enclosing an opening.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 4, 2003
    Applicant: SYMPATEX TECHNOLOGIES GMBH
    Inventors: Karsten F. Keidel, Liviu-Mihai Pavelescu, Paul E. Raith