Patents by Inventor Chin Li Cheung

Chin Li Cheung 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: 11577956
    Abstract: A method of producing ceria nanocrystals is provided. The method includes providing a gas that includes ozone to a solution that includes a cerium salt, and obtaining ceria nanocrystals from the solution after the gas is provided to the first solution. A method of producing nanoparticles is provided. The method includes providing a gas that includes ozone to a solution that includes a metal salt that includes at least one of a transition metal or a lanthanide, and producing at least one of metal oxide nanoparticles, metal oxynitrate nanoparticles, or metal oxyhydroxide nanoparticles from the solution after the gas is provided to the solution.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: February 14, 2023
    Assignee: NUtech Ventures
    Inventors: Chin Li Cheung, Christopher Mark Marin, Anuja Bhalkikar, Tamra Fisher
  • Patent number: 11155568
    Abstract: Materials and methods for preparing reactive lignin and for preparing a bio-based adhesive are described herein.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: October 26, 2021
    Assignee: NUtech Ventures
    Inventors: Mark Alan Helle, Chin Li Cheung
  • Publication number: 20200095270
    Abstract: Materials and methods for preparing reactive lignin and for preparing a bio-based adhesive are described herein.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 26, 2020
    Inventors: Mark Alan Helle, Chin Li Cheung
  • Patent number: 10533031
    Abstract: Materials and methods for preparing reactive lignin and for preparing a bio-based adhesive are described herein.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 14, 2020
    Assignee: NUtech Ventures
    Inventors: Mark Alan Helle, Chin Li Cheung
  • Publication number: 20190315629
    Abstract: A method of producing ceria nanocrystals is provided. The method includes providing a gas that includes ozone to a solution that includes a cerium salt, and obtaining ceria nanocrystals from the solution after the gas is provided to the first solution. A method of producing nanoparticles is provided. The method includes providing a gas that includes ozone to a solution that includes a metal salt that includes at least one of a transition metal or a lanthanide, and producing at least one of metal oxide nanoparticles, metal oxynitrate nanoparticles, or metal oxyhydroxide nanoparticles from the solution after the gas is provided to the solution.
    Type: Application
    Filed: April 15, 2019
    Publication date: October 17, 2019
    Inventors: Chin Li Cheung, Christopher Mark Marin, Anuja Bhalkikar, Tamra Fisher
  • Publication number: 20180037598
    Abstract: Materials and methods for preparing reactive lignin and for preparing a bio-based adhesive are described herein.
    Type: Application
    Filed: February 18, 2016
    Publication date: February 8, 2018
    Inventors: Mark Alan Helle, Chin Li Cheung
  • Patent number: 9738541
    Abstract: Cerium oxide nanorods having a variety of aspect ratios can be produced by providing a first mixture that includes a cerium precursor material, and using microwave to heat the first mixture to a first temperature for a period of time to produce first plurality of cerium oxide nanorods having a first range of aspect ratios. A second mixture that includes a cerium precursor material heated using microwave to a second temperature for a period of time to produce second plurality of cerium oxide nanorods having a second range of aspect ratios. The first plurality of cerium oxide nanorods and the second plurality of cerium oxide nanorods are mixed to produce third plurality of cerium oxide nanorods having the third range of aspect ratios that is broader than the first range or the second range.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: August 22, 2017
    Assignee: NUtech Ventures
    Inventors: Chin Li Cheung, Zane Charles Gernhart
  • Patent number: 9561491
    Abstract: A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce3+/Ce4+, in which the ratio of Ce3+/(Ce3++Ce4+) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce3+ and Ce4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: February 7, 2017
    Assignee: NUtech Ventures
    Inventors: Chin Li Cheung, Neil J. Lawrence, Joseph R. Brewer, Gonghua Wang
  • Publication number: 20160107896
    Abstract: Cerium oxide nanorods having a variety of aspect ratios can be produced by providing a first mixture that includes a cerium precursor material, and using microwave to heat the first mixture to a first temperature for a period of time to produce first plurality of cerium oxide nanorods having a first range of aspect ratios. A second mixture that includes a cerium precursor material heated using microwave to a second temperature for a period of time to produce second plurality of cerium oxide nanorods having a second range of aspect ratios. The first plurality of cerium oxide nanorods and the second plurality of cerium oxide nanorods are mixed to produce third plurality of cerium oxide nanorods having the third range of aspect ratios that is broader than the first range or the second range.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 21, 2016
    Inventors: Chin Li Cheung, Zane Charles Gernhart
  • Patent number: 9121947
    Abstract: According to one embodiment, an apparatus for detecting neutrons includes an array of pillars, wherein each of the pillars comprises a rounded cross sectional shape where the cross section is taken perpendicular to a longitudinal axis of the respective pillar, a cavity region between each of the pillars, and a neutron sensitive material located in each cavity region.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: September 1, 2015
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Rebecca J. Nikolic, Adam Conway, Qinghui Shao, Lars Voss, Chin Li Cheung, Mushtaq A. Dar
  • Patent number: 8829460
    Abstract: Three-dimensional boron particle loaded thermal neutron detectors utilize neutron sensitive conversion materials in the form of nano-powders and micro-sized particles, as opposed to thin films, suspensions, paraffin, etc. More specifically, methods to infiltrate, intersperse and embed the neutron nano-powders to form two-dimensional and/or three-dimensional charge sensitive platforms are specified. The use of nano-powders enables conformal contact with the entire charge-collecting structure regardless of its shape or configuration.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: September 9, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Rebecca J. Nikolic, Adam M. Conway, Robert T. Graff, Joshua D. Kuntz, Catherine Reinhardt, Lars F. Voss, Chin Li Cheung, Daniel Heineck
  • Publication number: 20130118564
    Abstract: An apparatus that includes a photovoltaic cell is provided. The photovoltaic cell includes a p-type thin film having a first rare earth sulfide, and an n-type thin film having a second rare earth sulfide. A p-n junction is formed between the p-type thin film and the n-type thin film. The photovoltaic cell includes a substrate and an at least partially transparent layer. The p-type and n-type thin films are deposited between the substrate and the at least partially transparent layer.
    Type: Application
    Filed: April 6, 2011
    Publication date: May 16, 2013
    Inventors: Chin Li Cheung, Joseph R. Brewer
  • Publication number: 20130123100
    Abstract: A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce3+/Ce4+, in which the ratio of Ce3+/(Ce3++Ce4+) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce3+ and Ce4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C.
    Type: Application
    Filed: April 6, 2011
    Publication date: May 16, 2013
    Inventors: Chin Li Cheung, Neil J. Lawrence, Joseph R. Brewer, Gonghua Wang
  • Publication number: 20130075848
    Abstract: Three-dimensional boron particle loaded thermal neutron detectors utilize neutron sensitive conversion materials in the form of nano-powders and micro-sized particles, as opposed to thin films, suspensions, paraffin, etc. More specifically, methods to infiltrate, intersperse and embed the neutron nano-powders to form two-dimensional and/or three-dimensional charge sensitive platforms are specified. The use of nano-powders enables conformal contact with the entire charge-collecting structure regardless of its shape or configuration.
    Type: Application
    Filed: July 18, 2012
    Publication date: March 28, 2013
    Applicant: Lawrence Livermore National Security, LLc
    Inventors: Rebecca J. Nikolic, Adam M. Conway, Robert T. Graff, Joshua D. Kuntz, Catherine Reinhardt, Lars F. Voss, Chin Li Cheung, Daniel Heineck
  • Publication number: 20130052708
    Abstract: Methods are described for conversion of carbohydrate polymers, including cellulose, that yield monosaccharide products, including glucose. Catalyst compositions that include functionalized metal/metal oxide clusters on cerium oxide nanostructures are described which provides product yields, e.g., greater that 50% in a single step process.
    Type: Application
    Filed: August 2, 2012
    Publication date: February 28, 2013
    Inventors: Chin Li Cheung, Neil J. Lawrence, Allen Kruse
  • Patent number: 8247070
    Abstract: The present invention comprises nano obelisks and nanostructures and methods and processes for same. The nano obelisks of the present invention are advantageous structures for use as electron source emitters. For example, the ultra sharp obelisks can be used as an emitter source to generate highly coherent and high energy electrons with high current.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 21, 2012
    Inventors: Barry Chin Li Cheung, Joseph Reese Brewer, Nirmalendu Deo
  • Publication number: 20100119825
    Abstract: The present invention comprises nano obelisks and nanostructures and methods and processes for same. The nano obelisks of the present invention are advantageous structures for use as electron source emitters. For example, the ultra sharp obelisks can be used as an emitter source to generate highly coherent and high energy electrons with high current.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 13, 2010
    Inventors: Barry Chin Li Cheung, Joseph Reese Brewer, Nirmalendu Deo
  • Patent number: 6743408
    Abstract: A method of producing carbon single wall nanotubes (SWNT) by CVD is disclosed. The SWNTs are grown on a metal-catalyzed support surface, such as a commercially available silicon tips for atomic force microscopes (AFM). The growth characteristics of the SWNTs can be controlled by adjusting the density of the catalyst and the CVD growth conditions. The length of the SWNTs can be adjusted through pulsed electrical etching. Nanotubes of this type can find applications in nanotubes structures with defined patterns and for nano-tweezers. Nano-tweezers may be useful for manipulating matter, such as biological material, on a molecular level.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: June 1, 2004
    Assignee: President and Fellows of Harvard College
    Inventors: Charles M. Lieber, Jason H. Hafner, Chin Li Cheung, Philip Kim
  • Patent number: 6716409
    Abstract: A method of fabricating SWNT probes for use in atomic force microscopy is disclosed. In one embodiment, the SWNT's are fabricated using a metallic salt solution. In another embodiment, the SWNT's are fabricated using metallic colloids.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: April 6, 2004
    Assignee: President and Fellows of the Harvard College
    Inventors: Jason H. Hafner, Chin Li Cheung, Charles M. Lieber
  • Publication number: 20020122766
    Abstract: A method of producing carbon single wall nanotubes (SWNT) by CVD is disclosed. The SWNTs are grown on a metal-catalyzed support surface, such as a commercially available silicon tips for atomic force microscopes (AFM). The growth characteristics of the SWNTs can be controlled by adjusting the density of the catalyst and the CVD growth conditions. The length of the SWNTs can be adjusted through pulsed electrical etching. Nanotubes of this type can find applications in nanotubes structures with defined patterns and for nano-tweezers. Nano-tweezers may be useful for manipulating matter, such as biological material, on a molecular level.
    Type: Application
    Filed: September 28, 2001
    Publication date: September 5, 2002
    Inventors: Charles M. Lieber, Jason H. Hafner, Chin Li Cheung, Philip Kim