Patents by Inventor Roman I. Pankiw

Roman I. Pankiw 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).

  • Cast heat-resistant austenitic steel with improved temperature creep properties and balanced alloying element additions and methodology for development of the same
    Patent number: 8318083
    Abstract: The present invention addresses the need for new austenitic steel compositions with higher creep strength and higher upper temperatures. The new austenitic steel compositions retain desirable phases, such as austenite, M23C6, and MC in its microstructure to higher temperatures. The present invention also discloses a methodology for the development of new austenitic steel compositions with higher creep strength and higher upper temperatures.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: November 27, 2012
    Assignee: UT-Battelle, LLC
    Inventors: Roman I Pankiw, Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz
  • Cast, heat-resistant austenitic stainless steels having reduced alloying element content
    Patent number: 8003045
    Abstract: A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0.4 to about 0.7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0.5 to about 1 Mn, about 0.6 to about 2 Si, about 0.05 to about 1 Nb, about 0.05 to about 1 W, about 0.05 to about 1.0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, M23C6, and M(C, N).
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: August 23, 2011
    Assignee: UT-Battelle, LLC
    Inventors: Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz, Roman I. Pankiw
  • Cast Heat-Resistant Austenitic Steel with Improved Temperature Creep Properties and Balanced Alloying Element Additions and Methodology for Development of the Same
    Publication number: 20100303669
    Abstract: The present invention addresses the need for new austenitic steel compositions with higher creep strength and higher upper temperatures. The present invention also discloses a methodology for the development of new austenitic steel compositions with higher creep strength and higher upper temperatures.
    Type: Application
    Filed: July 20, 2010
    Publication date: December 2, 2010
    Applicant: Ut-Battelle, LLC
    Inventors: Roman I. Pankiw, Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz
  • Cast, Heat-Resistant Austenitic Stainless Steels Having Reduced Alloying Element Content
    Publication number: 20100247370
    Abstract: A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0.4 to about 0.7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0.5 to about 1 Mn, about 0.6 to about 2 Si, about 0.05 to about 1 Nb, about 0.05 to about 1 W, about 0.05 to about 1.0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, M23C6, and M (C, N).
    Type: Application
    Filed: June 4, 2010
    Publication date: September 30, 2010
    Applicant: OAK RIDGE NATIONAL LABORATORY
    Inventors: Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz, Roman I. Pankiw
  • Cast, heat-resistant austenitic stainless steels having reduced alloying element content
    Patent number: 7749432
    Abstract: A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0.4 to about 0.7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0.5 to about 1 Mn, about 0.6 to about 2 Si, about 0.05 to about 1 Nb, about 0.05 to about 1 W, about 0.05 to about 1.0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, M23C6, and M(C, N).
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: July 6, 2010
    Assignee: UT-Battelle, LLC
    Inventors: Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz, Roman I. Pankiw
  • CAST HEAT-RESISTANT AUSTENITIC STEEL WITH IMPROVED TEMPERATURE CREEP PROPERTIES AND BALANCED ALLOYING ELEMENT ADDITIONS AND METHODOLOGY FOR DEVELOPMENT OF THE SAME
    Publication number: 20090053100
    Abstract: The present invention addresses the need for new austenitic steel compositions with higher creep strength and higher upper temperatures. The present invention also discloses a methodology for the development of new austenitic steel compositions with higher creep strength and higher upper temperatures.
    Type: Application
    Filed: December 7, 2006
    Publication date: February 26, 2009
    Inventors: Roman I. Pankiw, Govindarajan Muralidharan, Vinod Kumar Sikka, Philip J. Maziasz