Patents by Inventor Michael A. Kepros

Michael A. Kepros 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 for purifying leady oxides
    Patent number: 6153156
    Abstract: A process for providing a leady oxide having reduced levels of undesired metallic impurities such as, for example, bismuth and/or silver, comprises roasting the leady oxide to convert part to orthorhombic PbO, exposing the roasted leady oxide to particle size reduction so that the tetragonal PbO can be separated from the orthorhombic PbO fraction, and recovering the orthorhombic fraction having the reduced level of impurities.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: November 28, 2000
    Assignee: GNB Technologies, Inc.
    Inventors: Michel M. F. Lawrence, Michael A. Kepros