Patents by Inventor Robert J. Hofer

Robert J. Hofer 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).

  • Patent number: 5690889
    Abstract: A method of making a rare earth compound, such as a earth-transition metal permanent magnet compound, without the need for producing rare earth metal as a process step, comprises carbothermically reacting a rare earth oxide to form a rare earth carbide and heating the rare earth carbide, a compound-forming reactant (e.g. a transition metal and optional boron), and a carbide-forming element (e.g. a refractory metal) that forms a carbide that is more thermodynamically favorable than the rare earth carbide whereby the rare earth compound (e.g. Nd.sub.2 Fe.sub.14 B or LaNi.sub.5) and a carbide of the carbide-forming element are formed.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: November 25, 1997
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: R. William McCallum, Timothy W. Ellis, Kevin W. Dennis, Robert J. Hofer, Daniel J. Branagan