Patents by Inventor Yip-Wah Chung

Yip-Wah Chung 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: 10316379
    Abstract: Steel compositions are provided. A steel composition may include iron; from 0.015 to 0.06 wt. % carbon; from 9 to 12 wt. % chromium; from 0.75 to 1.5 wt. % manganese; from 0.08 to 0.18 wt. % molybdenum; from 0.10 to 0.30 wt. % silicon; from 0.2 to 1.0 wt. % vanadium; from 0.05 to 1.2 wt. % niobium; and optionally, an amount of an additional precipitate forming alloying element. Methods of making the steel compositions are also provided.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: June 11, 2019
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Cameron T. Gross, Yao Du, Xu Zhang, Dieter Isheim, Semyon Vaynman, Yip-Wah Chung, Zilin Jiang, Allan V. Mathai
  • Patent number: 10138439
    Abstract: A method for forming a lubrication material using self-dispersed crumpled graphene balls as additives in a lubricant base fluid for friction and wear reduction. The lubricant base fluid may be, for example, a polyalphaolefin type-4 (PAO4) oil. After the crumpled graphene balls are added as additives in the lubricant base fluid, the lubricant base fluid with the additives are sonicated for a sonicating time period, so that the crumpled graphene balls are self-dispersed in the lubricant base fluid to improve friction and wear properties of the lubricant base fluid. In some cases, a dispersing agent, such as Triethoxysilane, may be added in the lubricant base fluid to enhance stability of dispersion of the crumpled graphene balls in the lubricant base fluid. The crumpled graphene balls may stay stably dispersed in the lubricant base fluid between a lower temperature (such as ?15° C.) to a higher temperature (such as 90° C.).
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 27, 2018
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Jiaxing Huang, Qian Wang, Yip-Wah Chung, Xuan Dou
  • Patent number: 10081776
    Abstract: Compositions comprising one or more cyclen compounds which can be structurally modified to affect anti-friction and anti-wear functionality.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: September 25, 2018
    Assignee: Northwestern University
    Inventors: Tobin J. Marks, Qian Wang, Yip-Wah Chung, Massimiliano Delferro, Michael Desanker, Xingliang He
  • Patent number: 9896640
    Abstract: A method of using lubricant compositions to reduce wear between two surfaces exposed to a load condition of at least 1 GPa is provided. The lubricant compositions comprise polysiloxane base oils having alkylaryl or a combination of alkyl and aryl functionality. The polysiloxane base oils may be defined according to the formula: wherein R, R?, and R? are independently selected, such that R is an alkyl group having between 1-3 carbon atoms; R? is an alkylaryl group comprising alkyl functionality with 3-12 carbon atoms and aryl functionality with 6 to 12 carbon atoms; R? is an alkyl group having between 1-3 carbon atoms or an alkylaryl group comprising alkyl functionality with 3-12 carbon atoms and aryl functionality with 6 to 12 carbon atoms; and m and n are integers, such that 8<(m+n)<500.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: February 20, 2018
    Assignees: DOW CORNING CORPORATION, NORTHWESTERN UNIVERSITY
    Inventors: Andreas Stammer, Manfred Jungk, Herbert Stoegbauer, Yip-Wah Chung, Tobin J. Marks, Qian Jane Wang, Thomas J. Zolper
  • Publication number: 20170306258
    Abstract: A lubricant composition includes a base lubricant and a plurality of lubricant additive molecules. Each lubricant additive molecule includes a surface active group attractable to a target surface, and a carbon containing component connected to the surface active group, for providing a carbon source to form a carbon film on the target surface. A method for in situ forming of a carbon film using the lubricant composition, includes adding the lubricant composition into a target machine such that the lubricant composition is in contact with a target surface of the target machine, and operating the target machine to cause a temperature and a pressure at the target surface so that the carbon containing component is unraveled thereon to form a carbon film on the target surface during the operation.
    Type: Application
    Filed: October 22, 2015
    Publication date: October 26, 2017
    Inventors: Qian Wang, Yip-Wah Chung, Blake A. Johnson
  • Patent number: 9777021
    Abstract: Lubricant additives useful as friction reducing additives are disclosed herein that have a structure according to general formula I, where M is metal such as Ag, Au, Zn or Cu, and R1, R2, and R3, are each a hydrogen, or an alkyl, a substituted alkyl, or an aryl group.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: October 3, 2017
    Assignee: Qatar Foundation
    Inventors: Massimiliano Delferro, Tobin J. Marks, Q. Jane Wang, Yip-Wah Chung, Hassan S. Bazzi, Afif M. Seyam, Michael Desanker, Blake Johnson, Danni Jin
  • Patent number: 9765278
    Abstract: A method of using energy-efficient lubricant compositions to reduce wear between two surfaces exposed to a high shear condition is provided. The lubricant compositions comprise polysiloxane base oils having alkyl, aryl, or a combination of alkyl and aryl functionality. The polysiloxane base oils may be defined according to the formula: wherein R, and R? are independently selected, such that R is an alkyl group having between 1-3 carbon atoms; R? is an alkyl or aryl group having between 6 to 20 carbon atoms; and m and n are integers, such that 25<(m+n)<500 and the ratio of m/(m+n) is greater than 0.05 and less than 1.00.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: September 19, 2017
    Assignees: DOW CORNING CORPORATION, NORTHWESTERN UNIVERSITY
    Inventors: Andreas Stammer, Manfred Jungk, Herbert Stoegbauer, Yip-Wah Chung, Tobin J. Marks, Qian Jane Wang, Thomas J. Zolper
  • Publication number: 20170217993
    Abstract: Lubricant additives useful as friction reducing additives are disclosed herein that have a structure according to general formula I, where M is metal such as Ag, Au, Zn or Cu, and R1, R2, and R3, are each a hydrogen, or an alkyl, a substituted alkyl, or an aryl group.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 3, 2017
    Inventors: Massimiliano Delferro, Tobin J. Marks, Q. Jane Wang, Yip-Wah Chung, Hassan S. Bazzi, Afif M. Seyam, Michael Desanker, Blake Johnson, Danni Jin
  • Publication number: 20170121782
    Abstract: Steel compositions are provided. A steel composition may include iron; from 0.015 to 0.06 wt. % carbon; from 9 to 12 wt. % chromium; from 0.75 to 1.5 wt. % manganese; from 0.08 to 0.18 wt. % molybdenum; from 0.10 to 0.30 wt. % silicon; from 0.2 to 1.0 wt. % vanadium; from 0.05 to 1.2 wt. % niobium; and optionally, an amount of an additional precipitate forming alloying element. Methods of making the steel compositions are also provided.
    Type: Application
    Filed: October 18, 2016
    Publication date: May 4, 2017
    Inventors: Cameron T. Gross, Yao Du, Xu Zhang, Dieter Isheim, Semyon Vaynman, Yip-Wah Chung, Zilin Jiang, Allan V. Mathai
  • Publication number: 20170088788
    Abstract: A method for forming a lubrication material using self-dispersed crumpled graphene balls as additives in a lubricant base fluid for friction and wear reduction. The lubricant base fluid may be, for example, a polyalphaolefin type-4 (PAO4) oil. After the crumpled graphene balls are added as additives in the lubricant base fluid, the lubricant base fluid with the additives are sonicated for a sonicating time period, so that the crumpled graphene balls are self-dispersed in the lubricant base fluid to improve friction and wear properties of the lubricant base fluid. In some cases, a dispersing agent, such as Triethoxysilane, may be added in the lubricant base fluid to enhance stability of dispersion of the crumpled graphene balls in the lubricant base fluid. The crumpled graphene balls may stay stably dispersed in the lubricant base fluid between a lower temperature (such as ?15 ° C.) to a higher temperature (such as 90 ° C.).
    Type: Application
    Filed: September 30, 2016
    Publication date: March 30, 2017
    Inventors: Jiaxing Huang, Qian Wang, Yip-Wah Chung, Xuan Dou
  • Publication number: 20160333288
    Abstract: Compositions comprising one or more cyclen compounds which can be structurally modified to affect anti-friction and anti-wear functionality.
    Type: Application
    Filed: May 11, 2016
    Publication date: November 17, 2016
    Inventors: Tobin J. Marks, Q. Jane Wang, Yip-Wah Chung, Massimiliano Delferro, Michael Desanker, Xingliang He
  • Publication number: 20150315514
    Abstract: A method of using lubricant compositions to reduce wear between two surfaces exposed to a load condition of at least 1 GPa is provided. The lubricant compositions comprise polysiloxane base oils having alkylaryl or a combination of alkyl and aryl functionality. The polysiloxane base oils may be defined according to the formula: wherein R, R?, and R? are independently selected, such that R is an alkyl group having between 1-3 carbon atoms; R? is an alkylaryl group comprising alkyl functionality with 3-12 carbon atoms and aryl functionality with 6 to 12 carbon atoms; R? is an alkyl group having between 1-3 carbon atoms or an alkylaryl group comprising alkyl functionality with 3-12 carbon atoms and aryl functionality with 6 to 12 carbon atoms; and m and n are integers, such that 8<(m+n)<500.
    Type: Application
    Filed: November 27, 2013
    Publication date: November 5, 2015
    Inventors: Andreas STAMMER, Manfred JUNGK, Herbert STOEGBAUER, Yip-Wah CHUNG, Tobin J. MARKS, QIAN Jane WANG, Thomas J. ZOLPER
  • Publication number: 20150307808
    Abstract: Traction fluids and a method of using such tractions fluids to increase the interface friction between two surfaces moved relative to one another is provided. The traction fluid may comprise a polysiloxane base oil corresponding to the structural formula: wherein R and R? are independently selected, such that R is an alkyl group having between 1-3 carbon atoms; R? is a cycloalkyl dicycloalkyl, or aryl group having between 5-20 carbon atoms; m is an integer; and n is an integer or 0 with 5<(m+n)<100 and 0.50<m/(m+n)<1.00.
    Type: Application
    Filed: November 27, 2013
    Publication date: October 29, 2015
    Inventors: Andreas STAMMER, Manfred JUNGK, Herbert STOEGBAUER, Yip-Wah CHUNG, Tobin J. MARKS, Qian Jane WANG, Thomas J. ZOLPER
  • Publication number: 20150299609
    Abstract: A method of using energy-efficient lubricant compositions to reduce wear between two surfaces exposed to a high shear condition is provided. The lubricant compositions comprise polysiloxane base oils having alkyl, aryl, or a combination of alkyl and aryl functionality. The polysiloxane base oils may be defined according to the formula: wherein R, and R? are independently selected, such that R is an alkyl group having between 1-3 carbon atoms; R? is an alkyl or aryl group having between 6 to 20 carbon atoms; and m and n are integers, such that 25<(m+n)<500 and the ratio of m/(m+n) is greater than 0.05 and less than 1.00.
    Type: Application
    Filed: November 27, 2013
    Publication date: October 22, 2015
    Inventors: Andreas STAMMER, Manfred JUNGK, Herbert STOEGBAUER, Yip-Wah CHUNG, Tobin J. MARKS, QIAN Jane WANG, Thomas J. ZOLPER
  • Publication number: 20150167128
    Abstract: In one aspect of the invention, an alloy includes a first element comprising magnesium (Mg), titanium (Ti), zirconium (Zr), chromium (Cr), or nickelaluminum (NiAl), a second element comprising lithium (Li), calcium (Ca), manganese (Mn), aluminum (Al), or a combination thereof, and a third element comprising zinc (Zn). According to the invention, nanoscale precipitates is produced in the magnesium alloy by additions of zinc and specific heat-treatment. These precipitates lower the energy for dislocation movements and increase the number of available slip systems in the magnesium alloy at room temperature and hence improve ductility and formability of the magnesium alloy.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 18, 2015
    Inventors: Morris E. Fine, Semyon Vaynman, Evan T. Hunt, Akio Urakami, Yip-Wah Chung, Johannes Weertman
  • Publication number: 20100092747
    Abstract: There is provided single layer infrared-reflecting films and a method of making the same that provide enhanced reflectivity in an 800 nanometer to 2500 nanometer infrared waveband. The method comprises providing a substrate, depositing onto the substrate a mixture of an oxide matrix material and either a conductive metal dopant or a higher valence cation, and producing the infrared-reflecting film.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 15, 2010
    Applicant: NORTHWESTERN UNIVERSITY
    Inventors: Yip-Wah Chung, Michael Graham, Alpana Ranade
  • Patent number: 5776615
    Abstract: A composite material having high hardness comprises a carbon nitrogen compound, such as CN.sub.x where x is greater than 0.1 and up to 1.33, deposited on a metal or metal compound selected to promote deposition of substantially crystalline CN.sub.x. The carbon nitrogen compound is deposited on a crystal plane of the metal or metal compound sufficiently lattice-matched with a crystal plane of the carbon nitrogen compound that the carbon nitrogen compound is substantially crystalline. A plurality of layers of the compounds can be formed in alternating sequence to provide a multi-layered, superlattice coating having a coating hardness in the range of 45-55 GPa, which corresponds to the hardness of a BN coating and approaches that of a diamond coating.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: July 7, 1998
    Assignee: Northwestern University
    Inventors: Ming-Show Wong, Dong Li, Yip-Wah Chung, William D. Sproul, Xi Chu, Scott A. Barnett