Patents by Inventor Kapiappa G. Ragunathan

Kapiappa G. Ragunathan 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 stabilizing metal pigments against gassing
    Patent number: 8008405
    Abstract: The present invention is directed to a passivating material suitable for passivating a metal surface. The passivating material comprises a polymer which comprises (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group and/or a carboxylic acid group, wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: August 30, 2011
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Cathy A. Taylor, Daniel Rardon, Paul Lamers, Kapiappa G. Ragunathan, Shanti Swarup, Michael Hart