Patents by Inventor Anna S. Nached

Anna S. Nached 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).

  • Boron addition for making potassium-doped tungsten
    Patent number: 6478845
    Abstract: A boron addition for making potassium-doped tungsten powder is described herein. Boron is added to a potassium-doped starting material, preferably in the form of boric acid, and then the mixture is reduced to form a potassium-doped tungsten powder. The boron addition results in increased potassium incorporation in the potassium-doped tungsten powder and also effects an increase in potassium retention in sintered compacts of the potassium-doped tungsten powder.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: November 12, 2002
    Assignee: Osram Sylvania Inc.
    Inventors: Hans-Joachim Lunk, Michael Salmen, Anna S. Nached, Maria B. Winnicka, Henry J. Stevens