Patents by Inventor Michael Greengart

Michael Greengart 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).

  • Pickling of refractory metals
    Patent number: H2087
    Abstract: Refractory metal pickling bath of HF/H2O2 aqueous solution with recovery of the etched metal as a salt thereof and separation of dissolved impurities taken from the refractory metal, with avoidance of drawbacks of state of the art HF/HNO3 pickling solutions.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: November 4, 2003
    Assignee: H. C. Starck, Inc.
    Inventors: Robert W. Balliett, Arthur H. Bronstein, Thomas J. Ryan, Michael Greengart, Daniel J. Moynihan, Douglas A. Ryan, Paul Queneau, Mark Berggren, Brandon Hagen