Patents by Inventor Sara Helvoigt

Sara Helvoigt 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).

  • Compositions for forming transparent conductive nanoparticle coatings and process of preparation therefor
    Patent number: 6416818
    Abstract: A process produces a substantially stable aqueous dispersion of metal or metal oxide particles suitable for use in forming a transparent conductive coating. The process comprises the steps of (a) adding a nanocrystalline material to water, the nanocrystalline material comprising primary particles of metal or metal oxide having a substantially spherical shape and (b) mixing the nanocrystalline material and water to form an aqueous dispersion. The process identified above, prepares a substantially stable aqueous dispersion of nanocrystalline particles, which may be used in forming a transparent conductive coating.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: July 9, 2002
    Assignee: Nanophase Technologies Corporation
    Inventors: John H. Aikens, Harry W. Sarkas, Richard W. Brotzman, Jr., Sara Helvoigt