Patents by Inventor Dirk B. De Mooij

Dirk B. De Mooij 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 manufacturing a permanent magnet on the basis of NdFeB
    Patent number: 6045751
    Abstract: A description is given of a method of manufacturing a permanent magnet on the basis of NdFeB. In this method a powder of NdFeB and a powder of a Ga alloy, consisting mainly of Ga and one or more than one rare earth metals (RE), is mixed to form a mixture which is subsequently aligned, compressed and sintered. Such alloys can be ground into homogeneous, fine-grain powders in a simple manner. The composition of the alloy preferably corresponds to the formula REGa.sub.x, where x=1 or x=2. Alloys which are very suitable contain Dy and/or Tb as the rare earth metal.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: April 4, 2000
    Inventors: Kurt H. J. Buschow, Franciscus H. Feijen, Dirk B. De Mooij, Arjan Noordermeer
  • Hard magnetic material and magnet manufactured from such hard magnetic material
    Patent number: 5062907
    Abstract: A description is given of a hard magnetic material whose composition corresponds to the formula RE.sub.2 Fe.sub.17 C.sub.x, RE consisting of at least 70 at. % of Sm. This material has a relatively large uniaxial magnetic anisotropy and a relatively high T.sub.c and is very suitable for use in permanent magnets.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: November 5, 1991
    Assignee: U.S. Philips Corp.
    Inventors: Kurt H. J. Buschow, Dirk B. de Mooij, Theodora H. Jacobs
  • Magnetic material comprising iron, boron and a rare earth metal
    Patent number: 4935074
    Abstract: A magnetic material of the composition Fe.sub.79-x-y B.sub.21+x R.sub.y in which R is a rare earth element or a mixture of such elements and wherein -5<x<5 and <y.ltoreq.+4.8The preferred rare earth element is neodymium and/or praseodymium.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: June 19, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Dirk B. De Mooij, Kurt H. J. Buschow