Patents by Inventor Chi Woon Leung

Chi Woon Leung 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).

  • BIODEGRADABLE ELECTROCHEMICAL DEVICE
    Publication number: 20220344713
    Abstract: A biodegradable solid aqueous electrolyte composition, an electrochemical device incorporating the electrolyte composition, and methods for the same are provided. The electrolyte composition may include a hydrogel of a copolymer and a salt dispersed in the hydrogel. The copolymer may include at least two polycaprolactone chains attached to a polymeric center block. The electrochemical device may include an anode, a cathode, and the electrolyte composition disposed between the anode and the cathode. The electrolyte composition may include a crosslinked, biodegradable polymeric material that is radiatively curable prior to being crosslinked.
    Type: Application
    Filed: August 19, 2020
    Publication date: October 27, 2022
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Naveen CHOPRA, Nan-Xing HU, Gregory McGUIRE, Robert BLACK, Alexis LAFORGUE, Edmond LAM, Chi Woon LEUNG, Yali LIU, Sophie REGNIER, Nathalie CHAPLEAU, Asmae MOKRINI
  • BIODEGRADABLE ELECTROCHEMICAL DEVICE
    Publication number: 20220173433
    Abstract: A biodegradable solid aqueous electrolyte composition, an electrochemical device incorporating the electrolyte composition, and methods for the same are provided. The electrolyte composition may include a rubber-like hydrogel including a copolymer and a salt. The copolymer may include at least two polycaprolactone chains coupled with a polymeric center block. The polymeric center block may include polyvinyl alcohol. The hydrogel may be biodegradable. The electrochemical device may include an anode, a cathode, and the electrolyte composition disposed between the anode and the cathode.
    Type: Application
    Filed: February 18, 2022
    Publication date: June 2, 2022
    Applicants: XEROX CORPORATION, NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Naveen CHOPRA, Nan-Xing HU, Gregory McGUIRE, Robert BLACK, Alexis LAFORGUE, Edmond LAM, Chi Woon LEUNG, Yali LIU, Sophie REGNIER
  • Chitin nanocrystals and process for preparation thereof
    Patent number: 10214596
    Abstract: A process for producing chitin nanocrystals (ChNCs) involves contacting a chitinous material with a sufficient amount of an inorganic persulfate to produce chitin nanocrystals from the chitinous material. The process permits one-spot production of ChNCs from biomasses such as crustaceans, fungi, mushrooms, insects or mixtures thereof. Chitin nanocrystals produced by the process comprise surface carboxylic groups and are not initially deacetylated.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: February 26, 2019
    Inventors: John H. Luong, Edmond Lam, Chi Woon Leung, Sabahudin Hrapovic, Keith B. Male
  • Chitin Nanocrystals and Process for Preparation Thereof
    Publication number: 20160272731
    Abstract: A process for producing chitin nanocrystals (ChNCs) involves contacting a chitinous material with a sufficient amount of an inorganic persulfate to produce chitin nanocrystals from the chitinous material. The process permits one-spot production of ChNCs from biomasses such as crustaceans, fungi, mushrooms, insects or mixtures thereof. Chitin nanocrystals produced by the process comprise surface carboxylic groups and are not initially deacetylated.
    Type: Application
    Filed: November 12, 2014
    Publication date: September 22, 2016
    Inventors: John H. Luong, Edmond Lam, Chi Woon Leung, Sabahudin Hrapovic, Keith B. Male
  • Cellulose nanocrystals from renewable biomass
    Patent number: 8900706
    Abstract: A process for producing cellulose nanocrystals (CNCs) involves providing a cellulosic material, contacting the cellulosic material with an inorganic persulfate at an elevated temperature to produce CNCs, and recovering the CNCs. The process permits one-step production of CNCs from vegetative biomasses such as flax and hemp. Cellulose nanocrystals produced by the process with carboxylic groups are more uniform and have higher aspect ratios than CNCs produced by prior art processes.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: December 2, 2014
    Assignee: National Research Council of Canada
    Inventors: Chi Woon Leung, John H. T. Luong, Sabahudin Hrapovic, Edmond Lam, Yali Liu, Keith B. Male, Khaled Mahmoud, Denis Rho
  • CELLULOSE NANOCRYSTALS FROM RENEWABLE BIOMASS
    Publication number: 20120244357
    Abstract: A process for producing cellulose nanocrystals (CNCs) involves providing a cellulosic material, contacting the cellulosic material with an inorganic persulfate at an elevated temperature to produce CNCs, and recovering the CNCs. The process permits one-step production of CNCs from vegetative biomasses such as flax and hemp. Cellulose nanocrystals produced by the process with carboxylic groups are more uniform and have higher aspect ratios than CNCs produced by prior art processes.
    Type: Application
    Filed: March 15, 2010
    Publication date: September 27, 2012
    Inventors: Chi Woon Leung, John H.T. Luong, Sabahudin Hrapovic, Edmond Lam, Yali Liu, Keith B. Male, Khaled Mahmoud, Denis Rho