Patents by Inventor Le Xiang Liao

Le Xiang Liao 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).

  • Permanent magnet material containing a rare-earth element, iron, nitrogen and carbon
    Patent number: 5720828
    Abstract: Magnetic materials containing a rare earth metal, and iron or a similar metal, as well as nitrogen and carbon, are produced by gas absorbing nitrogen and carbon sequentially into a parent intermetallic compound; the resulting magnetic materials have high T.sub.c, .mu..sub.o M.sub.s and .mu..sub.o H.sub.A, are essentially free of .alpha.-Fe, and have a coercivity at 300.degree. K. of at least 1.5 T. Anisotropic magnetic materials are produced by pretreating the intermetallic compound, which contains carbon, by powder sintering or oriented hot shaping, followed by nitriding and/or carbiding.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: February 24, 1998
    Assignee: Martinex R&D Inc.
    Inventors: John Olaf Strom-Olsen, Xinhe Chen, Le Xiang Liao, Zaven Altounian, Dominic Hugh Ryan