Patents by Inventor Frank Ahrenhold

Frank Ahrenhold 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).

  • PROCESS FOR PRODUCING RAW STEEL AND AGGREGATE FOR PRODUCTION THEREOF
    Publication number: 20230323491
    Abstract: The invention relates to a process for producing low-nitrogen crude steel. This process includes melting directly reduced iron and/or scrap in a melting furnace with arc resistance heating to give a metallic melt and a slag. The metallic melt is removed from the melting furnace and used to charge a converter. The metallic melt is refined in the converter to give liquid crude steel. The liquid crude steel is tapped having a nitrogen content [N] of not more than 50 ppm, especially of not more than 30 ppm.
    Type: Application
    Filed: August 3, 2021
    Publication date: October 12, 2023
    Applicant: ThyssenKrupp Steel Europe AG
    Inventors: Matthias Weinberg, Frank Ahrenhold