Patents by Inventor Parul W. DHALL

Parul W. DHALL 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).

  • Laser cladding Fe—Cr alloy on downhole tools
    Patent number: 9382596
    Abstract: A hardfacing composition composed of an Fe—Cr alloy. The alloy is comprised of 80 wt % iron, about 2 wt % to about 20 wt % Cr, less than 1 wt % Si and less than 1 wt % C. The alloy's microstructure is at least 80 vol % martensite; and less than 20 vol % austenite.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: July 5, 2016
    Assignee: National Oilwell Varco, L.P.
    Inventors: Raju Pillai, Jiinjen A. Sue, Parul W. Dhall
  • LASER CLADDING FE-CR ALLOY ON DOWNHOLE TOOLS
    Publication number: 20130068449
    Abstract: A hardfacing composition composed of an Fe—Cr alloy. The alloy is comprised of 80 wt % iron, about 2 wt % to about 20 wt % Cr, less than 1 wt % Si and less than 1 wt % C. The alloy's microstructure is at least 80 vol % martensite; and less than 20 vol % austenite.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: NATIONAL OILWELL VARCO,LP.
    Inventors: Raju PILLAI, Jiinjen A. SUE, Parul W. DHALL