Patents by Inventor Su Cronogue

Su Cronogue 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).

  • Non-uniaxial permanent magnet material
    Patent number: 5403408
    Abstract: A permanent magnet material having the formula, in atomic %:TM.sub.(84.3.-w-z) RE.sub.(3.0+w) B.sub.(12.7+z),wherein -3.3.ltoreq.z<3.3 and -2.0.ltoreq.w<2.0; orTM.sub.(89.8-x-y) RE.sub.(3.5+y) B.sub.(6.7+x),wherein -2.5.ltoreq.y<2.5 and -2.7.ltoreq.x.ltoreq.2.7; orTM.sub.(96.5-q-r) RE.sub.(1+q) B.sub.(2.5+r),wherein -1.5.ltoreq.r.ltoreq.1.5 and 0.ltoreq.q<6.5-r; and wherein TM is a transition metal, RE is a rare earth metal, and B is boron or a combination of boron and carbon. The permanent magnet materials include at least weight percent non-uniaxial material and possess a coercivity of at least 1,000 Oersteds.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: April 4, 1995
    Assignee: Inland Steel Company
    Inventors: Robert F. Krause, John Keem, Jun S. Im, Su Cronogue