Patents by Inventor Berthold Menrad

Berthold Menrad 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).

  • Sintered abrasion resistant iron alloy having a homogeneous carbide network
    Patent number: 3971632
    Abstract: A particular composition and method are given for an iron alloy which will produce an article by sintering which is highly resistant to abrasion as well as possessing high tensile strength. The alloy is particularly useful for bearings, either rotary or planar. Conditions of sintering are described to produce articles from a novel sintering powder having a homogenous carbide network in a lamellated, perlitic base structure with interspersed residual austenite and martensite to considerably improve the abrasion resistance.
    Type: Grant
    Filed: October 16, 1973
    Date of Patent: July 27, 1976
    Assignee: Zahnradfabrik Friedrichshafen AG
    Inventors: Berthold Menrad, Karl Ripper, Rudolf Ilg, Georg Dietrich