Patents by Inventor Martha Rebecca STOKES

Martha Rebecca STOKES 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).

  • Determining a cation exchange capacity of a rock sample
    Patent number: 11549902
    Abstract: Provided herein are various embodiments of determining a cation exchange capacity of a rock sample. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises equilibrating the rock sample to a relative humidity, performing a dielectric permittivity measurement on the rock sample at the relative humidity, and determining a cation exchange capacity of the rock sample based on the dielectric permittivity measurement. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises receiving a dielectric permittivity measurement on the rock sample, and determining a cation exchange capacity for the rock sample based on the dielectric permittivity measurement of the rock sample and a relationship between cation exchange capacity and dielectric permittivity measurements for mineral mixtures corresponding to a range of cation exchange capacity values.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: January 10, 2023
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Martha Rebecca Stokes, Zheng Yang, Prince E. Ezebuiro, Timothy B. Fischer
  • DETERMINING A CATION EXCHANGE CAPACITY OF A ROCK SAMPLE
    Publication number: 20210318259
    Abstract: Provided herein are various embodiments of determining a cation exchange capacity of a rock sample. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises equilibrating the rock sample to a relative humidity, performing a dielectric permittivity measurement on the rock sample at the relative humidity, and determining a cation exchange capacity of the rock sample based on the dielectric permittivity measurement. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises receiving a dielectric permittivity measurement on the rock sample, and determining a cation exchange capacity for the rock sample based on the dielectric permittivity measurement of the rock sample and a relationship between cation exchange capacity and dielectric permittivity measurements for mineral mixtures corresponding to a range of cation exchange capacity values.
    Type: Application
    Filed: August 21, 2020
    Publication date: October 14, 2021
    Applicant: CHEVRON U.S.A. INC.
    Inventors: Martha Rebecca STOKES, Zheng YANG, Prince E. EZEBUIRO, Timothy B. FISCHER