Patents by Inventor Leah Donham

Leah Donham 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).

  • Dispersant and detergent systems for improved motor oil performance
    Patent number: 11926804
    Abstract: The present disclosure relates to passenger car motor oil lubricating oil compositions having select dispersant and detergent systems to improve at least one of deposits, sludge, oxidization, and wear when using a blend of API Group II base oils with one or more API Group III and/or API Group IV base oils. The dispersant systems herein includes select amounts of boron, nitrogen, and total base number contributions that surprisingly achieve performance even when including higher amounts of the API Group II base oils in the lubricants.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: March 12, 2024
    Assignee: Afton Chemical Corporation
    Inventors: Leah Donham, Kongsheng Yang, Kenneth Garelick, Kristi Engelman
  • Mixed fleet capable lubricating compositions
    Patent number: 11578287
    Abstract: This disclosure describes lubricating additives and lubricants including such additives suitable for and/or configured for mixed fleet use and, for instance, additives and lubricants that satisfy performance standards for typical spark ignition passenger car lubricants as well as performance standards for lubricants suitable for typical compression ignition heavy duty engine applications.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: February 14, 2023
    Assignee: Afton Chemical Corporation
    Inventors: Nicholas Giles, Abaigeal Ritzenthaler, Leah Donham