Patents Represented by Attorney Ronald D. Hartman

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  • System and method for determining deposit formation and mitigation by fuel additives
    Patent number: 5492005
    Abstract: The invention is a system and method to rate fuels and fuel additives for their tendency to form and mitigate intake system deposits in engines.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: February 20, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Howard S. Homan, Allan C. Schott
  • Slurry bubble column (C-2391)
    Patent number: 5348982
    Abstract: The present invention is a method for optimally operating a three phase slurry bubble column. The constituents of the three phases, gas, liquid, and solids, are determined by the chemical reaction in the column. The method includes injecting the gas phase into the column with an appropriate velocity so that the solid phase is fluidized while still maintaining "plug flow" over the column length.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: September 20, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventors: Eric Herbolzheimer, Enrique Iglesia
  • Permeability determination from NMR relaxation measurements for fluids in porous media
    Patent number: 5289124
    Abstract: The present invention is a method to rapidly determine the fluid-flow permeability of porous media with nuclear magnetic resonance (NMR). The method can be applied to measurements of permeability in fluid-saturated earth formations using NMR logging tools.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: February 22, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Michael Jerosch-Herold, Hans Thomann