Patents by Inventor David W. Kern

David W. Kern 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).

  • Air cooled gas injection lance
    Patent number: 4941646
    Abstract: An air cooled refractory covered injection lance for introducing reactive gases below the surface of a molten metal bath where the lance is provided with means to surround the reactive gas conduit with a high velocity cooling fluid to prevent thermal decomposition of the reactive gas prior to its injection into the molten metal bath.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: July 17, 1990
    Assignees: Bethlehem Steel Corporation, Air Products & Chemicals, Inc.
    Inventors: Philip D. Stelts, David W. Kern, Kenneth J. Fioravanti
  • Chemical dehydrogenation of molten ferrous alloys using a halogen-containing compound
    Patent number: 4869749
    Abstract: The present invention is a process for the removal of hydrogen from molten ferrous alloys in the unkilled state via a chemical reaction with a halogen-containing compound. The halogen-containing compound is typically introduced into the molten alloy in the gaseous state. The process can be carried out in a conventional ladle metallurgy station.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: September 26, 1989
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Kenneth J. Fioravanti, David W. Kern, Philip D. Stelts