Patents by Inventor Thomas B. Morrow

Thomas B. Morrow 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).

  • Patent number: 7398160
    Abstract: A gas energy meter that acquires the data and performs the processing for an inferential determination of one or more gas properties, such as heating value, molecular weight, or density. The meter has a sensor module that acquires temperature, pressure, CO2, and speed of sound data. Data is acquired at two different states of the gas, which eliminates the need to determine the concentration of nitrogen in the gas. A processing module receives this data and uses it to perform a “two-state” inferential algorithm.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: July 8, 2008
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Eric Kelner, Thomas E. Owen
  • Patent number: 7197403
    Abstract: Methods for inferentially determining various properties of a gas mixture, when the speed of sound in the gas is known at an arbitrary temperature and pressure. The method can be applied to natural gas mixtures, where the known parameters are the sound speed, temperature, pressure, and concentrations of any dilute components of the gas. The method uses a set of reference gases and their calculated density and speed of sound values to estimate the density of the subject gas. Additional calculations can be made to estimate the molecular weight of the subject gas, which can then be used as the basis for heating value calculations. The method may also be applied to inferentially determine density and molecular weight for gas mixtures other than natural gases.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: March 27, 2007
    Assignees: Southwest Research Institute, Gas Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring, II
  • Patent number: 7010433
    Abstract: A method of indirectly measuring the diluent (nitrogen and carbon dioxide) concentrations in a natural gas mixture. The molecular weight of the gas is modeled as a function of the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. A set of reference gas mixtures with known molecular weights and diluent concentrations is used to calculate the constant values. For the gas in question, if the speed of sound in the gas is measured at three states, the three resulting expressions of molecular weight can be solved for the nitrogen and carbon dioxide concentrations in the gas mixture.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: March 7, 2006
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Thomas E. Owen
  • Patent number: 6850847
    Abstract: A computer product for determining thermodynamic properties of a natural gas hydrocarbon, when the speed of sound in the gas is known at an arbitrary temperature and pressure. Thus, the known parameters are the sound speed, temperature, pressure, and concentrations of any dilute components of the gas. The method uses a set of reference gases and their calculated density and speed of sound values to estimate the density of the subject gas. Additional calculations can be made to estimate the molecular weight of the subject gas, which can then be used as the basis for mass flow calculations, to determine the speed of sound at standard pressure and temperature, and to determine various thermophysical characteristics of the gas.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: February 1, 2005
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring, II
  • Publication number: 20040220751
    Abstract: A method of indirectly measuring the diluent (nitrogen and carbon dioxide) concentrations in a natural gas mixture. The molecular weight of the gas is modeled as a function of the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. A set of reference gas mixtures with known molecular weights and diluent concentrations is used to calculate the constant values. For the gas in question, if the speed of sound in the gas is measured at three states, the three resulting expressions of molecular weight can be solved for the nitrogen and carbon dioxide concentrations in the gas mixture.
    Type: Application
    Filed: March 24, 2004
    Publication date: November 4, 2004
    Applicant: Southwest Research Institute
    Inventors: Thomas B. Morrow, Thomas E. Owen
  • Patent number: 6804610
    Abstract: A methods of indirectly measuring the nitrogen concentration in a gas mixture. The molecular weight of the gas is modeled as a function of the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. Regression analysis is used to calculate the constant values, which can then be substituted into the model equation. If the speed of sound in the gas is measured at two states and diluent concentrations other than nitrogen (typically carbon dioxide) are known, two equations for molecular weight can be equated and solved for the nitrogen concentration in the gas mixture.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: October 12, 2004
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring, II
  • Publication number: 20040158411
    Abstract: A computer product for determining thermodynamic properties of a natural gas hydrocarbon, when the speed of sound in the gas is known at an arbitrary temperature and pressure. Thus, the known parameters are the sound speed, temperature, pressure, and concentrations of any dilute components of the gas. The method uses a set of reference gases and their calculated density and speed of sound values to estimate the density of the subject gas. Additional calculations can be made to estimate the molecular weight of the subject gas, which can then be used as the basis for mass flow calculations, to determine the speed of sound at standard pressure and temperature, and to determine various thermophysical characteristics of the gas.
    Type: Application
    Filed: February 3, 2004
    Publication date: August 12, 2004
    Applicant: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring
  • Patent number: 6754592
    Abstract: Methods of indirectly measuring the nitrogen concentration in a natural gas by heating the gas. In two embodiments, the heating energy is correlated to the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. Regression analysis is used to calculate the constant values, which can then be substituted into the model equation. If the diluent concentrations other than nitrogen (typically carbon dioxide) are known, the model equation can be solved for the nitrogen concentration.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: June 22, 2004
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring, II
  • Publication number: 20040019436
    Abstract: Methods of indirectly measuring the nitrogen concentration in a natural gas by heating the gas. In two embodiments, the heating energy is correlated to the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. Regression analysis is used to calculate the constant values, which can then be substituted into the model equation. If the diluent concentrations other than nitrogen (typically carbon dioxide) are known, the model equation can be solved for the nitrogen concentration.
    Type: Application
    Filed: June 12, 2003
    Publication date: January 29, 2004
    Inventors: Thomas B. Morrow, Kendricks A. Behring
  • Publication number: 20030212496
    Abstract: A methods of indirectly measuring the nitrogen concentration in a gas mixture. The molecular weight of the gas is modeled as a function of the speed of sound in the gas, the diluent concentrations in the gas, and constant values, resulting in a model equation. Regression analysis is used to calculate the constant values, which can then be substituted into the model equation. If the speed of sound in the gas is measured at two states and diluent concentrations other than nitrogen (typically carbon dioxide) are known, two equations for molecular weight can be equated and solved for the nitrogen concentration in the gas mixture.
    Type: Application
    Filed: March 27, 2003
    Publication date: November 13, 2003
    Inventors: Thomas B. Morrow, Kendricks A. Behring
  • Patent number: 6604051
    Abstract: A system and method to characterize natural gas hydrocarbons using a single inferential property, such as standard sound speed, when the concentrations of the diluent gases (e.g., carbon dioxide and nitrogen) are known. The system to determine a thermophysical property of a gas having a first plurality of components comprises a sound velocity measurement device, a concentration measurement device, and a processor to determine a thermophysical property as a function of a correlation between the thermophysical property, the speed of sound, and the concentration measurements, wherein the number of concentration measurements is less than the number of components in the gas. The method includes the steps of determining the speed of sound in the gas, determining a plurality of gas component concentrations in the gas, and determining the thermophysical property as a function of a correlation between the thermophysical property, the speed of sound, and the plurality of concentrations.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: August 5, 2003
    Assignee: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring, II
  • Publication number: 20030114992
    Abstract: A method to determine thermodynamic properties of a natural gas hydrocarbon, when the speed of sound in the gas is known at an arbitrary temperature and pressure. Thus, the known parameters are the sound speed, temperature, pressure, and concentrations of any dilute components of the gas. The method uses a set of reference gases and their calculated density and speed of sound values to estimate the density of the subject gas. Additional calculations can be made to estimate the molecular weight of the subject gas, which can then be used as the basis for mass flow calculations, to determine the speed of sound at standard pressure and temperature, and to determine various thermophysical characteristics of the gas.
    Type: Application
    Filed: September 9, 2002
    Publication date: June 19, 2003
    Applicant: Southwest Research Institute
    Inventors: Thomas B. Morrow, Kendricks A. Behring