Patents Represented by Attorney Edna I. Gergel

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  • 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 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
  • Carbonate thermochemical cycle for the production of hydrogen
    Patent number: 7666387
    Abstract: The present invention is directed to a thermochemical method for the production of hydrogen from water. The method includes reacting a multi-valent metal oxide, water and a carbonate to produce an alkali metal-multi-valent metal oxide compound, carbon dioxide, and hydrogen.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: February 23, 2010
    Assignee: UT-Battelle, LLC
    Inventors: Jack L Collins, Leslie R Dole, Juan J Ferrada, Charles W Forsberg, Marvin J Haire, Rodney D Hunt, Benjamin E Lewis, Jr., Raymond G Wymer
  • Robust carbon monolith having hierarchical porosity
    Patent number: 7449165
    Abstract: A carbon monolith includes a robust carbon monolith characterized by a skeleton size of at least 100 nm, and a hierarchical pore structure having macropores and mesopores.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: November 11, 2008
    Assignees: UT-Battelle, LLC, UTRF
    Inventors: Sheng Dai, Georges A. Guiochon, Chengdu Liang
  • Method and device for diagnosing and controlling combustion instabilities in internal combustion engines operating in or transitioning to homogeneous charge combustion ignition mode
    Patent number: 7431011
    Abstract: This invention is a method of achieving stable, optimal mixtures of HCCI and SI in practical gasoline internal combustion engines comprising the steps of: characterizing the combustion process based on combustion process measurements, determining the ratio of conventional and HCCI combustion, determining the trajectory (sequence) of states for consecutive combustion processes, and determining subsequent combustion process modifications using said information to steer the engine combustion toward desired behavior.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: October 7, 2008
    Assignee: UT-Battelle, LLC
    Inventors: Robert M. Wagner, Charles S. Daw, Johney B. Green, Kevin D. Edwards
  • Microfluidic systems and methods for transport and lysis of cells and analysis of cell lysate
    Patent number: 7419575
    Abstract: Microfluidic systems and methods are disclosed which are adapted to transport and lyse cellular components of a test sample for analysis. The disclosed microfluidic systems and methods, which employ an electric field to rupture the cell membrane, cause unusually rapid lysis, thereby minimizing continued cellular activity and resulting in greater accuracy of analysis of cell processes.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: September 2, 2008
    Assignee: UT-Battelle, LLC
    Inventors: Christopher T. Culbertson, Stephen C. Jacobson, Maxine A. McClain, J. Michael Ramsey