Patents by Inventor Andre Witzmann

Andre Witzmann 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 the heat-softened severance of glass tubes or plates
    Patent number: 5902368
    Abstract: Disclosed is a method for the heat-softened severance of thin-walled glass tubes or plates with a wall thickness of no more than 0.2 mm, wherein the glass is softened on a width of no more than 0.4 mm, the softened area is reduced by drawing to a wall thickness of no more than 0.05 mm, and then is separated by additional heating in the drawn-out area.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: May 11, 1999
    Assignee: Schott-Glaswerke
    Inventors: Andre Witzmann, Ulla Trinks