Patents by Inventor Humphrey Lungisani Sithebe

Humphrey Lungisani Sithebe 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 PROCESSING A BODY OF POLYCRYSTALLINE DIAMOND MATERIAL
    Publication number: 20150136738
    Abstract: A method of processing a polycrystalline diamond (PCD) material having a non-diamond phase comprising a diamond catalyst/solvent and/or one or more metal carbides, comprises leaching an amount of the diamond catalyst/solvent and/or one or more metal carbides from the PCD material by exposing at least a portion of the PCD material to a leaching solution. The leaching solution comprises nitric acid diluted in water, wherein the nitric acid is between around 2 to 5 wt % in the nitric acid and water mixture, and one or more additional mineral acids.
    Type: Application
    Filed: December 20, 2012
    Publication date: May 21, 2015
    Applicant: Element Six Abrasives S.A.
    Inventors: Nokuthula Princess Ndlovu, Humphrey Lungisani Sithebe