Patents by Inventor Kristi Engelman

Kristi Engelman 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: 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
  • Publication number: 20230093530
    Abstract: A lubricating oil composition and method for controlling timing chain stretch, wherein the composition contains greater than 50 wt. % of base oil, zinc dialkyl dithiophosphate(s) to provide 350-2200 ppm zinc, molybdenum-containing compound(s) to provide >1-3000 ppm molybdenum, and magnesium-containing detergent(s) to provide <2050 ppm magnesium, all based on the total weight of the composition. The composition has a total TBN of less than 7.5 mg KOH/g, measured by ASTM D-2896 and a weight ratio of ppm of zinc from zinc dialkyl dithiophosphate(s) to ppm of molybdenum from molybdenum-containing compound(s) of <10. The method employs the lubricating oil composition to control timing chain stretch to a level of 0.1% or less.
    Type: Application
    Filed: July 31, 2021
    Publication date: March 23, 2023
    Applicant: AFTON CHEMICAL CORPORATION
    Inventors: Ken Garelick, Lesley Schmid, Kristi Engelman
  • Patent number: 11608477
    Abstract: A lubricating oil composition and method for controlling timing chain stretch, wherein the composition contains greater than 50 wt. % of base oil, zinc dialkyl dithiophosphate(s) to provide 350-2200 ppm zinc, molybdenum-containing compound(s) to provide >1-3000 ppm molybdenum, and magnesium-containing detergent(s) to provide <2050 ppm magnesium, all based on the total weight of the composition. The composition has a total TBN of less than 7.5 mg KOH/g, measured by ASTM D-2896 and a weight ratio of ppm of zinc from zinc dialkyl dithiophosphate(s) to ppm of molybdenum from molybdenum-containing compound(s) of <10. The method employs the lubricating oil composition to control timing chain stretch to a level of 0.1% or less.
    Type: Grant
    Filed: July 31, 2021
    Date of Patent: March 21, 2023
    Assignee: AFTON Chemical Corporation
    Inventors: Ken Garelick, Leslie Schmid, Kristi Engelman
  • Patent number: 11584898
    Abstract: A polymer surfactant for improving engine oil emulsion properties of a lubricating composition mixed with water and/or fuel contamination, particularly at very cold temperatures, is described herein. In approaches, selected polymeric and functionalized compounds can impart both robust emulsion properties and simultaneously deliver good low temperature fluidity for lubricating compositions that may contain residual amounts of water and/or fuel contamination. Lubricating compositions including such surfactants demonstrate robust properties at temperatures down to about ?30° C.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: February 21, 2023
    Assignee: Afton Chemical Corporation
    Inventors: Yunhai Bai, Joseph Remias, Yen Tran, Amy M. James, Kristi Engelman
  • Publication number: 20220049180
    Abstract: A polymer surfactant for improving engine oil emulsion properties of a lubricating composition mixed with water and/or fuel contamination, particularly at very cold temperatures, is described herein. In approaches, selected polymeric and functionalized compounds can impart both robust emulsion properties and simultaneously deliver good low temperature fluidity for lubricating compositions that may contain residual amounts of water and/or fuel contamination. Lubricating compositions including such surfactants demonstrate robust properties at temperatures down to about ?30° C.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 17, 2022
    Inventors: Yunhai Bai, Joseph Remias, Yen Tran, Amy M. James, Kristi Engelman
  • Publication number: 20190075787
    Abstract: A composition including a caprolactam-derived solvent and a crop protective active ingredient. An emulsifiable concentrate including a caprolactam-derived solvent, an organic co-solvent, an emulsifier, and a crop protective active ingredient is also provided.
    Type: Application
    Filed: September 13, 2018
    Publication date: March 14, 2019
    Inventors: Edward Asirvatham, Robert W. Emblidge, Kristi Engelman, Jaime A. Flores-Vasquez, Kevin Kashurba, Scott R. Keenan, James A. Kweeder, Venkata Krishna Sai Pappu, Lihao Tang, Xiawei Zhang