Patents by Inventor Werner Pepperhoff

Werner Pepperhoff 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).

  • Cryogenic steel
    Patent number: 4028098
    Abstract: A manganese chromium steel with 20 to 30% Mn, 5 to 12% Cr; up to 0.5% C and additives such as 1.5% Si, 0.5% V and possibly others. The steel is preferably used for pipes transporting liquified gas. The steel has relatively low thermal expansion.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: June 7, 1977
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Werner Pepperhoff, Friedhelm Richter