Patents by Inventor Andreas Franziskus

Andreas Franziskus 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 modifying and thereby improving the corrosion resistance and hardness of workpieces of ferritic steel
    Patent number: 5196075
    Abstract: The invention relates to a method for making workpieces of ferritic steel, such as drilling screws wherein the workpiece is made of a transformable chrome steel having a chrome percentage of at least 13%, whereupon a workpiece receives a coating from nickel or a nickel or cobald alloy having a thickness of at least 5 .mu.m, and subsequently the workpiece is heat treated under oxygen free environment at at least 850.degree. C. so as to obtain a desired hardness and corrosion resistance.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: March 23, 1993
    Assignee: ITW-ATECO GmbH
    Inventors: Knut Jansen, Andreas Franziskus, Hans J. Plumer