Patents by Inventor Rainer Willing-Lepenies

Rainer Willing-Lepenies 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 Pre-treatment of steel parts prior to salt bath nitriding
    Patent number: 5735971
    Abstract: Flawless nitrating layers are obtained during the nitro-carburizing of components made from steels which form passive layers in salt baths if these components are first pre-treated in an oxidizing salt melt at 300.degree. to 500.degree. C. prior to the nitro-carburizing process.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: April 7, 1998
    Assignee: Durferrit GmbH Thermotechnik
    Inventors: Georg Wahl, Rainer Willing-Lepenies