Patents by Inventor Theresa Liang Gunawan

Theresa Liang Gunawan 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: 11802255
    Abstract: Disclosed herein are improved lubricating compositions effective to prevent or reduce low speed pre-ignition in an engine, as well as to prevent or reduce corrosion of engine components. The lubricating compositions include a base oil combined with a calcium chelate complex, optionally in further combination with additional additives.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: October 31, 2023
    Assignees: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
    Inventors: Ian G. Elliott, Amir Gamal Maria, Richard Eugene Cherpeck, Theresa Liang Gunawan
  • Publication number: 20220333027
    Abstract: Provided is a fuel composition for improving fuel efficiency. The fuel composition includes greater than 50 wt % of a hydrocarbon fuel boiling in the gasoline or diesel range, a minor amount a zinc chelator, and a minor amount of a friction modifier. The friction modifier includes at least one polar group.
    Type: Application
    Filed: August 31, 2020
    Publication date: October 20, 2022
    Inventors: Richard Eugene CHERPECK, Amir Gamal MARIA, Theresa Liang GUNAWAN
  • Patent number: 11441477
    Abstract: Disclosed is a lubricating engine oil composition for use in down-sized boosted engines comprising a lubricating oil base stock as a major component, and at least one silane-containing compound. Also disclosed is a method for preventing or reducing low speed pre-ignition in a direct injected, boosted, spark ignited internal combustion engine, and the use of at least one silane-containing compound in a lubricating engine oil composition for preventing or reducing low speed pre-ignition in a direct injected, boosted, spark ignited internal combustion engine.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: September 13, 2022
    Assignees: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
    Inventors: John Robert Miller, Richard Eugene Cherpeck, Ian G. Elliott, Theresa Liang Gunawan, Amir Gamal Maria
  • Patent number: 11401482
    Abstract: Disclosed is a method for preventing or reducing low speed pre-ignition in an engine lubricated with a formulated oil. The formulated oil has a composition comprising at least one oil soluble or oil dispersible cobalt-containing compound.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: August 2, 2022
    Assignees: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
    Inventors: Ian G. Elliott, Richard E. Cherpeck, Amir Gamal Maria, Theresa Liang Gunawan
  • Publication number: 20220145199
    Abstract: The present disclosure provides a fuel composition that includes hydrocarbon-based fuel boiling in the gasoline or diesel range; an amine-based detergent given by formula R1—O—(CH2)m—NHR2, wherein the additive is present in about 10 ppm to about 750 ppm by weight based on total weight of the fuel composition; wherein R1 is a hydrocarbylgroup having 8 to 20 carbons, R2 is hydrogen or (CH2)nNH2 moiety, and wherein m, n are independently integers having a value of 3 or greater; and one or more nitrogen-containing detergent.
    Type: Application
    Filed: July 7, 2021
    Publication date: May 12, 2022
    Applicants: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC
    Inventors: Chung-Hao KUO, William Raymond RUHE, JR., Man Kit NG, Peter A. FUENTES-AFFLICK, Andrew M. ICKES, Carrie Y. CHAN, Theresa Liang GUNAWAN
  • Patent number: 11142715
    Abstract: Friction modifier and compositions containing the friction modifier as a fuel additive are provided. Methods for improving fuel efficiency using these compositions are also provided.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: October 12, 2021
    Assignees: CHEVRON U.S.A. INC., CHEVRON ORONITE COMPANY LLC
    Inventors: Theresa Liang Gunawan, Richard Eugene Cherpeck, Amir Gamal Maria
  • Patent number: 10844307
    Abstract: Disclosed is a lubricating engine oil composition for a direct injected, boosted, spark ignited internal combustion engine comprising from about 25 to about 3000 ppm of metal from at least one manganese-containing compound, based on the total weight of the lubricating oil. Also disclosed is a method for preventing or reducing low speed pre-ignition in an engine lubricated with said lubricating engine oil composition.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: November 24, 2020
    Assignees: CHEVRON ORONITE COMPANY LLC, CHEVRON U.S.A. INC.
    Inventors: Ian G. Elliott, Amir Gamal Maria, Richard Eugene Cherpeck, Theresa Liang Gunawan, Andrew M. Thomas
  • Publication number: 20200283695
    Abstract: Disclosed herein are improved lubricating compositions effective to prevent or reduce low speed pre-ignition in an engine, as well as to prevent or reduce corrosion of engine components. The lubricating compositions include a base oil combined with a calcium chelate complex, optionally in further combination with additional additives.
    Type: Application
    Filed: March 4, 2020
    Publication date: September 10, 2020
    Inventors: Ian G. ELLIOTT, Amir Gamal MARIA, Richard Eugene CHERPECK, Theresa Liang GUNAWAN
  • Publication number: 20200255762
    Abstract: Disclosed is a lubricating engine oil composition comprising a lubricating oil base stock as a major component, and at least one metal or metalloid hydrogen atom donor compound. Also disclosed is a method for preventing or reducing low speed pre-ignition in a direct injected, boosted, spark ignited internal combustion engine, and the use of at least one metal or metalloid hydrogen atom donor compound in a lubricating engine oil composition for preventing or reducing low speed pre-ignition in a direct injected, boosted, spark ignited internal combustion engine.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 13, 2020
    Inventors: Ian G. Elliott, John Robert Miller, Theresa Liang Gunawan, Richard Eugene Cherpeck, Amir Gamal Maria
  • Publication number: 20200140771
    Abstract: Friction modifier and compositions containing the friction modifier as a fuel additive are provided. Methods for improving fuel efficiency using these compositions are also provided.
    Type: Application
    Filed: November 5, 2019
    Publication date: May 7, 2020
    Inventors: Theresa Liang Gunawan, Richard Eugene Cherpeck, Amir Gamal Maria
  • Publication number: 20200109343
    Abstract: Fuel and lubricant compositions are provided that contain an organic hydride-based reductant. Methods for preventing or reducing low speed pre-ignition events in an internal combustion engines using these compositions are also provided.
    Type: Application
    Filed: October 2, 2019
    Publication date: April 9, 2020
    Inventors: Richard Eugene Cherpeck, Ian G. Elliott, Theresa Liang Gunawan, Amir Gamal Maria
  • Publication number: 20200017789
    Abstract: Disclosed herein is a fuel composition having (1) greater than 50 wt % of a hydrocarbon fuel boiling in the gasoline or diesel range and (2) a minor amount of a low-speed pre-ignition (LSPI)-reducing additive having one or more of an amidine, or a beta-amino alkanol having the structure R1, R2, R3, and R4 are each independently selected from hydrogen, aromatic ring, and a C1-C20 alkyl group and R5 is hydrogen or an alcohol having the structure —(CH)R6—OH. R6 is hydrogen, a C1-C10 alkyl group, or a C1-C10 alkenyl group, or a salt thereof.
    Type: Application
    Filed: September 23, 2019
    Publication date: January 16, 2020
    Inventors: Richard Eugene Cherpeck, Amir Gamal Maria, Ian G. Elliott, Theresa Liang Gunawan
  • Publication number: 20190360384
    Abstract: Disclosed is a lubricating engine oil composition for a direct injected, boosted, spark ignited internal combustion engine comprising from about 25 to about 3000 ppm of metal from at least one manganese-containing compound, based on the total weight of the lubricating oil. Also disclosed is a method for preventing or reducing low speed pre-ignition in an engine lubricated with said lubricating engine oil composition.
    Type: Application
    Filed: May 10, 2019
    Publication date: November 28, 2019
    Inventors: Ian G. Elliott, Amir Gamal Maria, Richard Eugene Cherpeck, Theresa Liang Gunawan, Andrew M. Thomas
  • Publication number: 20190292473
    Abstract: Fuel and lubricant compositions are provided that contain a primary low-speed pre-ignition (LSPI)-reducing additive comprising (i) an amino additive, (ii) an amine additive, (iii) a triazole additive, (iv) a benzamidinium additive, (v) a benzoxazole additive, or (vi) a N?C—X motif additive. Methods for preventing or reducing low speed pre-ignition events in spark-ignited engines using these compositions are also provided.
    Type: Application
    Filed: March 22, 2019
    Publication date: September 26, 2019
    Inventors: Richard Eugene Cherpeck, Amir Gamal Maria, Ian G. Elliott, Theresa Liang Gunawan
  • Patent number: 10358615
    Abstract: Disclosed herein is a method comprising the steps of (a) providing a fuel additive concentrate comprising (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive concentrate, of one or more fatty acid sorbitan esters, and (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive concentrate, of a fuel carrier fluid, and (b) storing the fuel additive concentrate at a low temperature environment. Also disclosed is a method operating an internal combustion engine with a fuel composition comprising (a) a major amount of a fuel, and (b) a minor amount of one or more fatty acid sorbitan esters in a low temperature environment.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 23, 2019
    Assignee: Chevron U.S.A. Inc.
    Inventor: Theresa Liang Gunawan
  • Patent number: 10301566
    Abstract: Disclosed herein is a fuel additive comprising a mixture of (a) one or more fatty acid sorbitan esters and (b) one or more fatty acid monoesters of a polyol, wherein the one or more fatty acid sorbitan esters are present in an amount of about 0.05 wt. % to about 50 wt. %, based on the weight of the fuel additive, and the one or more fatty acid monoesters of a polyol are present in an amount of about 99.95 wt. % to about 50 wt. %, based on the weight of the fuel additive. Also disclosed is a fuel composition comprising a major amount of a fuel and minor amount of the fuel additive.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: May 28, 2019
    Assignee: Chevron U.S.A. Inc.
    Inventor: Theresa Liang Gunawan
  • Publication number: 20190078033
    Abstract: Disclosed is a method for preventing or reducing low speed pre-ignition in an engine lubricated with a formulated oil. The formulated oil has a composition comprising at least one oil soluble or oil dispersible cobalt-containing compound.
    Type: Application
    Filed: September 13, 2018
    Publication date: March 14, 2019
    Inventors: Ian G. Elliott, Richard E. Cherpeck, Amir Gamal Maria, Theresa Liang Gunawan
  • Publication number: 20190016986
    Abstract: A lubricant composition for a direct injected, boosted, spark ignited internal combustion engine that contains at least one zirconium-containing compound is disclosed. This disclosure also relates to a method for preventing or reducing low speed pre-ignition in an engine lubricated with a formulated oil. The formulated oil has a composition comprising at least one oil soluble or oil dispersible zirconium-containing compound.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 17, 2019
    Inventors: Ian G. Elliott, Richard E. Hogendoorn, Theresa Liang Gunawan, Man Hon Tsang, Richard E. Cherpeck, Amir Gamal Maria, Andrew Michael Thomas
  • Publication number: 20190016985
    Abstract: A lubricant composition for a direct injected, boosted, spark ignited internal combustion engine that contains at least one non-sulfur-phosphorus containing zinc compound is disclosed. This disclosure also relates to a method for preventing or reducing low speed pre-ignition in an engine lubricated with a formulated oil. The formulated oil has a composition comprising at least one oil soluble or oil dispersible non-sulfur-phosphorus containing zinc compound.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 17, 2019
    Inventors: Ian G. Elliott, Christophe P. Le Deore, Richard E. Cherpeck, Amir Gamal Maria, Theresa Liang Gunawan
  • Publication number: 20180094202
    Abstract: Disclosed herein is a method comprising the steps of (a) providing a fuel additive concentrate comprising (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive concentrate, of one or more fatty acid sorbitan esters, and (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive concentrate, of a fuel carrier fluid, and (b) storing the fuel additive concentrate at a low temperature environment. Also disclosed is a method operating an internal combustion engine with a fuel composition comprising (a) a major amount of a fuel, and (b) a minor amount of one or more fatty acid sorbitan esters in a low temperature environment.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 5, 2018
    Inventor: Theresa Liang Gunawan