Patents by Inventor Lanny P. Lincoln

Lanny P. Lincoln 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).

  • Rare earth-transition metal scrap treatment method
    Patent number: 5087291
    Abstract: Rare earth-transition metal (e.g. iron) scrap (e.g. Nd-Fe-B scrap) is melted to reduce the levels of tramp oxygen and nitrogen impurities therein. The tramp impurities are reduced in the melt by virtue of the reaction of the tramp impurities and the rare earth to form dross on the melt. The purified melt is separated from the dross for reuse. The oxygen and nitrogen of the melt are reduced to levels acceptable for reuse of the treated alloy in the manufacture of end-use articles, such as permanent magnets.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: February 11, 1992
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Frederick A. Schmidt, David T. Peterson, John T. Wheelock, Lawrence L. Jones, Lanny P. Lincoln