Patents by Inventor Yungwan Kwak

Yungwan Kwak 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).

  • Publication number: 20240034953
    Abstract: The present disclosure relates to a driveline for an electric or hybrid-electric vehicle including an electric motor with an insulated magnet wire and a lubricating and cooling fluid configured to maintain the durability of the magnet wire.
    Type: Application
    Filed: October 3, 2023
    Publication date: February 1, 2024
    Inventors: Piotr Grzyska, Yungwan Kwak
  • Patent number: 11814599
    Abstract: The present disclosure relates to a driveline for an electric or hybrid-electric vehicle including an electric motor with an insulated magnet wire and a lubricating and cooling fluid configured to maintain the durability of the magnet wire.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: November 14, 2023
    Assignee: Afton Chemical Corporation
    Inventors: Piotr Grzyska, Yungwan Kwak
  • Publication number: 20230313067
    Abstract: The present disclosure relates to a driveline for an electric or hybrid-electric vehicle including an electric motor with an insulated magnet wire and a lubricating and cooling fluid configured to maintain the durability of the magnet wire.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 5, 2023
    Inventors: Piotr Grzyska, Yungwan Kwak
  • Patent number: 11512263
    Abstract: The present disclosure relates to methods of lubricating an electric or a hybrid-electric transmission using a lubricant including a solvent system with a blend of one or more base oils with a branched diester and one or more poly(meth)acrylate copolymers, transmissions therefor, and lubricating compositions suitable for such applications that exhibit good lubricant properties, good electrical properties, and good cooling efficiency at the same time.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 29, 2022
    Assignee: Afton Chemical Corporation
    Inventor: Yungwan Kwak
  • Publication number: 20220169945
    Abstract: The present disclosure relates to a durable lubricating fluid for an electric motor or hybrid-electric motor. The disclosed technology relates to a durable lubricating fluid comprising an oil of lubricating viscosity, a thiadiazole or derivative thereof, and an amine salt of a phosphoric acid.
    Type: Application
    Filed: December 1, 2020
    Publication date: June 2, 2022
    Inventors: Atanu Adhvaryu, Christopher Cleveland, Yungwan Kwak
  • Patent number: 11326123
    Abstract: The present disclosure relates to a durable lubricating fluid for an electric motor or hybrid-electric motor. The disclosed technology relates to a durable lubricating fluid comprising an oil of lubricating viscosity, a thiadiazole or derivative thereof, and an amine salt of a phosphoric acid.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: May 10, 2022
    Assignee: Afton Chemical Corporation
    Inventors: Atanu Adhvaryu, Christopher Cleveland, Yungwan Kwak
  • Publication number: 20210324293
    Abstract: The present disclosure relates to methods of lubricating an electric or a hybrid-electric transmission using a lubricant including a solvent system with a blend of one or more base oils with a branched diester and one or more poly(meth)acrylate copolymers, transmissions therefor, and lubricating compositions suitable for such applications that exhibit good lubricant properties, good electrical properties, and good cooling efficiency at the same time.
    Type: Application
    Filed: July 1, 2021
    Publication date: October 21, 2021
    Inventor: Yungwan Kwak
  • Patent number: 11085006
    Abstract: The present disclosure relates to methods of lubricating an electric or a hybrid-electric transmission using a lubricant including a solvent system with a blend of one or more base oils with a branched diester and one or more poly(meth)acrylate copolymers, transmissions therefor, and lubricating compositions suitable for such applications that exhibit good lubricant properties, good electrical properties, and good cooling efficiency at the same time.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: August 10, 2021
    Assignee: Afton Chemical Corporation
    Inventor: Yungwan Kwak
  • Publication number: 20210009920
    Abstract: The present disclosure relates to methods of lubricating an electric or a hybrid-electric transmission using a lubricant including a solvent system with a blend of one or more base oils with a branched diester and one or more poly(meth)acrylate copolymers, transmissions therefor, and lubricating compositions suitable for such applications that exhibit good lubricant properties, good electrical properties, and good cooling efficiency at the same time.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 14, 2021
    Inventor: Yungwan Kwak
  • Patent number: 10351792
    Abstract: The present disclosure relates to polymers suitable for viscosity index improvers in lubricating oil compositions and further relates to oil compositions comprising such polymers. The disclosure also relates to polymer compositions derived from alkyl (meth)acrylate monomers and selected molar ratios of the (meth)acrylate monomers in the polymer suitable to use as viscosity modifiers.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: July 16, 2019
    Assignee: Afton Chemical Corporation
    Inventor: Yungwan Kwak
  • Patent number: 10144900
    Abstract: The present disclosure relates to star polymers and, in some approaches, star polymers suitable for use as viscosity index improvers in lubricating oil compositions. The present disclosure further relates to oil compositions comprising such polymers. The disclosure also relates to star polymer compositions derived from a sulfur functionalized chain transfer agent core and select (meth)acrylate monomers.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 4, 2018
    Assignee: Afton Chemical Corporation
    Inventor: Yungwan Kwak
  • Publication number: 20180327687
    Abstract: The present disclosure relates to polymers suitable for viscosity index improvers in lubricating oil compositions and further relates to oil compositions comprising such polymers. The disclosure also relates to polymer compositions derived from alkyl (meth)acrylate monomers and selected molar ratios of the (meth)acrylate monomers in the polymer suitable to use as viscosity modifiers.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 15, 2018
    Inventor: Yungwan Kwak
  • Patent number: 9988590
    Abstract: The present disclosure relates to comb or brush polymers and, in some approaches, comb or brush polymers suitable for use as viscosity index improvers in lubricating oil compositions. The present disclosure further relates to oil compositions comprising such polymers. The disclosure also relates to brush polymer compositions derived from sulfur functionalized polydialkylsiloxane backbones and various (meth)acrylate monomers.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: June 5, 2018
    Assignee: Afton Chemical Corporation
    Inventor: Yungwan Kwak
  • Patent number: 9533297
    Abstract: A series of ligands with site specific electron donating substituents that form a catalyst complex with a transition metal and are suitable for catalysis of atom transfer radical reactions, including ATRP are described. Faster catalysis rates were observed allowing for low catalyst concentrations and linear increases in molecular weight with monomer conversion, and narrow molecular weight distributions. Cyclic voltammetry revealed that increasing the strength and number of conjugated electron donating groups resulted in more stable complexes and larger ATRP equilibrium constants.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: January 3, 2017
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Yungwan Kwak, Joanna Burdynska, Andrea Elsen, Kristin Schroeder
  • Patent number: 9139715
    Abstract: A coated metal pigment that has excellent passivation, dispersion and adhesion properties, a method for producing the coated metal pigment and a coating composition that includes the coated metal pigment are described.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 22, 2015
    Assignee: Silberline Manufacturing Co., Inc.
    Inventors: Anand Sundararaman, Yungwan Kwak, Craig Keemer, John Buchala, Mary Kate Thomas, Chang Xu, Parfait Jean Marie Likibi
  • Publication number: 20150087795
    Abstract: A series of ligands with site specific electron donating substituents that form a catalyst complex with a transition metal and are suitable for catalysis of atom transfer radical reactions, including ATRP are described. Faster catalysis rates were observed allowing for low catalyst concentrations and linear increases in molecular weight with monomer conversion, and narrow molecular weight distributions. Cyclic voltammetry revealed that increasing the strength and number of conjugated electron donating groups resulted in more stable complexes and larger ATRP equilibrium constants.
    Type: Application
    Filed: February 22, 2013
    Publication date: March 26, 2015
    Inventors: Krzysztof Matyjaszewski, Yungwan Kwak, Joanna Burdynska, Andrea Elsen, Kristin Schroeder
  • Publication number: 20140076201
    Abstract: A coated metal pigment that has excellent passivation, dispersion and adhesion properties, a method for producing the coated metal pigment and a coating composition that includes the coated metal pigment are described.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Applicant: SILBERLINE MANUFACTURING CO. INC.
    Inventors: Anand SUNDARARAMAN, Yungwan KWAK, Craig KEEMER, John BUCHALA, Mary Kate THOMAS, Chang XU, Parfait Jean Marie LIKIBI
  • Patent number: 8445610
    Abstract: A transition metal mediated chain transfer agent controlled polymerization process is described. The process combines the advantages of atom transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. Synthesis of chain transfer agents useful in the disclosed processes is also disclosed. Other improvements on ATRP RAFT processes are also described.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: May 21, 2013
    Assignee: Carnegie Mellon University
    Inventors: Yungwan Kwak, Renaud Nicolay, Krzysztof Matyjaszewski
  • Publication number: 20110046324
    Abstract: A transition metal mediated chain transfer agent controlled polymerization process is described. The process combines the advantages of atom transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. Synthesis of chain transfer agents useful in the disclosed processes is also disclosed. Other improvements on ATRP RAFT processes are also described.
    Type: Application
    Filed: March 6, 2009
    Publication date: February 24, 2011
    Inventors: Krzysztof Matyjaszewski, Yungwan Kwak, Renaud Nicolay