Patents by Inventor Johan Ewald Westraadt

Johan Ewald Westraadt 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: 10328550
    Abstract: A method of forming a super hard PCD construction comprises forming an aggregated mass comprising a catalyst/solvent material for diamond, and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, forming a pre-sinter assembly comprising the aggregated mass and a plurality of diamond grains and treating the pre-sinter assembly at UHPT to form a PCD construction. Residual catalyst/solvent and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in non-carbide form at least partially fill a plurality of interstitial regions in the PCD. There is also disclosed a superhard PCD construction comprising a body of PCD material formed of a mass of diamond grains and a non-superhard phase at least partially filling a plurality of interstitial regions, wherein the non-superhard phase comprises one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in the non-carbide form.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: June 25, 2019
    Assignee: ELEMENT SIX ABRASIVES S.A.
    Inventor: Johan Ewald Westraadt
  • Publication number: 20160016291
    Abstract: A method of forming a super hard PCD construction comprises forming an aggregated mass comprising a catalyst/solvent material for diamond, and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, forming a pre-sinter assembly comprising the aggregated mass and a plurality of diamond grains and treating the pre-sinter assembly at UHPT to form a PCD construction. Residual catalyst/solvent and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in non-carbide form at least partially fill a plurality of interstitial regions in the PCD. There is also disclosed a superhard PCD construction comprising a body of PCD material formed of a mass of diamond grains and a non-superhard phase at least partially filling a plurality of interstitial regions, wherein the non-superhard phase comprises one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in the non-carbide form.
    Type: Application
    Filed: December 2, 2013
    Publication date: January 21, 2016
    Inventor: Johan Ewald Westraadt