Patents by Inventor Sevi Gaiffi

Sevi Gaiffi 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).

  • Method of making cerium misch-metal/cobalt magnets
    Patent number: 4144105
    Abstract: A permanent magnetic material, predominantly containing cerium misch-metal (CeMM) and cobalt, characterized by the composition:(CeMM.sub.1-x RE.sub.x).sub.1-y Sm.sub.y Co.sub.5.+-.0.2wherein0<x<0.5; 0.ltoreq.y.ltoreq.0.25,wherein cerium misch-metal approximately possesses the compositionCe.sub..alpha. La.sub..beta. Nd.sub..gamma. Pr.sub..delta., where0.45<.alpha.<0.550.20<.beta.<0.400.05<.gamma.<0.150.00<.delta.<0.05 and .alpha.+.beta.+.gamma.+.delta..perspectiveto.1.And wherein RE consists of the alloyNd.sub.A Pr.sub.B (Ce, La, Sm).sub.Cwherein A is 0.75, B is 0.22, C is less than 0.03 and A+B+C=1.
    Type: Grant
    Filed: September 9, 1976
    Date of Patent: March 13, 1979
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventors: Sevi Gaiffi, Anton Menth, Harmut Nagel
  • Cerium misch-metal/cobalt magnets
    Patent number: 4087291
    Abstract: A permanent magnetic material, predominantly containing cerium misch-metal (CeMM) and cobalt, characterized by the composition:(CeMM.sub.1-x RE.sub.x).sub.1 -y Sm.sub.y Co.sub.5.+-.0.2Wherein0<x<0.5; 0.ltoreq.y.ltoreq.0.25,Re comprises at least one of the rare earths, cerium, lanthanum, neodymium and praseodymium, and the cerium misch-metal approximately possesses the compositionCe.sub.60 La.sub..beta. Nd.sub..gamma. Pr.sub..delta.,Wherein0.45<.alpha.<0.550.20<.beta.<0.400.05<.gamma.<0.150.00<.delta.<0.05And.alpha.+.beta.+.gamma.+.delta..perspectiveto.1.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: May 2, 1978
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventors: Sevi Gaiffi, Anton Menth, Hartmut Nagel