Patents by Inventor Ulrich Siemers

Ulrich Siemers 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).

  • Process for the manufacturing of optical waveguides with fusion of a sleeving tube onto a mother preform
    Patent number: 5127929
    Abstract: An optical waveguide preform is fabricated by inserting a rod inside a tube and collapsing the tube. The inner diameter of the tube is adjusted before inserting the rod to provide a predetermined gap width between the inner surface of the tube and the outer surface of the rod. The gap width is selected as a function of the cross sectional area of the tube in order to minimize core eccentricity in the finished waveguide.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: July 7, 1992
    Assignee: Alcatel N.V.
    Inventors: Robert Gunther, Ulrich Siemers, Manfred Wittmann