Patents by Inventor Horst Prietzel

Horst Prietzel 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 and composition for the desulfurization of molten metals
    Patent number: 4159906
    Abstract: Molten metals, especially molten pig iron, are desulfurized by contacting them with a composition comprising calcium carbide or calcium cyanamide and an additive agent yielding water or hydrogen at the temperature of the molten metal; preferred as the additive agents are the alkali metal hydrides, polyethylene or polyamide for yielding hydrogen and hydrate of lime and alkaline earth borates for yielding water.
    Type: Grant
    Filed: May 18, 1977
    Date of Patent: July 3, 1979
    Assignee: Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft
    Inventors: Walter Meichsner, Heinrich Rock, Alfred Freissmuth, Horst Prietzel, Heinrich Rellermeyer, Wolfgang Ullrich, Erich Pfluger, Raymund Sindermann
  • Method and composition for the desulfurization of molten metals
    Patent number: 4078915
    Abstract: Molten metals, especially molten pig iron, are desulfurized by contacting them with a composition comprising calcium carbide or calcium cyanamide and an additive agent yielding water or hydrogen at the temperature of the molten metal; preferred as the additive agents are the alkali metal hydrides, polyethylene or polyamide for yielding hydrogen and hydrate of lime and alkaline earth borates for yielding water.
    Type: Grant
    Filed: October 23, 1973
    Date of Patent: March 14, 1978
    Assignee: Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft
    Inventors: Walter Meichsner, Heinrich Rock, Alfred Freissmuth, Horst Prietzel, Heinrich Rellermeyer, Wolfgang Ullrich, Erich Pfluger, Raymund Sindermann