Patents by Inventor Erhard Schelzke

Erhard Schelzke 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).

  • Brass alloy
    Patent number: 3982933
    Abstract: A brass alloy consisting essentially of 57 to 62% by weight copper, 1 to 4% by weight lead and the balance zinc has improved machinability in terms of allowing high coating speeds or affording reduced coating tool wear, especially when the alloy is machined upon an automatic lathe, by the inclusion therein of 0.15 to 0.20% by weight each of tin and magnesium.
    Type: Grant
    Filed: October 31, 1973
    Date of Patent: September 28, 1976
    Assignee: Vereinigte Deutsche Metallwerke AG
    Inventors: Gunther Rudolph, Erhard Schelzke, Antonio Leogrande