Patents by Inventor Ka Fu YUNG

Ka Fu YUNG 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).

  • Durable antimicrobial treatment of textile for use in healthcare environment
    Patent number: 12252841
    Abstract: Compositions and methods are described that provide cellulosic and non-cellulosic fabrics with durable antimicrobial properties. Application of a coating that includes polyhexamethylene biguanide, polyethylene glycol, and a binder to a fabric followed by drying and curing was found to provide antimicrobial properties that are retained through over 100 washings under aggressive hospital washing conditions. In addition, tactile properties and tear resistance of the treated fabrics are maintained or improved.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: March 18, 2025
    Assignee: Avalon Polymills (HK) Limited
    Inventors: Johnson Yiu-Nam Lau, Denise So Bik Chan, Jiachi Chiou, Chi Wai Kan, Kim Hung Lam, Wai Han Lam, Ka Fu Yung
  • Durable Antimicrobial Treatment of Textile for Use in Healthcare Environment
    Publication number: 20210156080
    Abstract: Compositions and methods are described that provide cellulosic and non-cellulosic fabrics with durable antimicrobial properties. Application of a coating that includes polyhexamethylene biguanide, polyethylene glycol, and a binder to a fabric followed by drying and curing was found to provide antimicrobial properties that are retained through over 100 washings under aggressive hospital washing conditions. In addition, tactile properties and tear resistance of the treated fabrics are maintained or improved.
    Type: Application
    Filed: April 4, 2019
    Publication date: May 27, 2021
    Inventors: Johnson Yiu-Nam LAU, Denise So Bik CHAN, Jiachi CHIOU, Chi Wai KAN, Kim Hung LAM, Wai Han LAM, Ka Fu YUNG
  • Catalyst and method for biodiesel production from unrefined low-grade oil and crude aqueous alcohols
    Patent number: 10654789
    Abstract: A catalyst for catalyzing transesterification of esters or esterification of fatty acids, the catalyst is selected from the group consisting of manganese (II) glycerolate, cobalt (II) glycerolate, iron (II) glycerolate, and any combination thereof. A method for transesterification reaction, includes: a) providing a catalyst, wherein the catalyst is selected from the group consisting of manganese (II) glycerolate, cobalt (II) glycerolate, iron (II) glycerolate, and any combination thereof; b) adding the catalyst, one or more alcohols, and a composition comprising one or more esters to a reactor to form a reaction mixture; and c) stirring while heating the reaction mixture for reaction to form transesterification products.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: May 19, 2020
    Assignee: THE HONG KONG POLYTECHNIC UNIVERSITY SHENZHEN RESEARCH INSTITUTE
    Inventors: Ka-fu Yung, Wing-tak Wong, Tsz-lung Kwong, Pak-chung Lau
  • CATALYST AND METHOD FOR BIODIESEL PRODUCTION FROM UNREFINED LOW-GRADE OIL AND CRUDE AQUEOUS ALCOHOLS
    Publication number: 20180265446
    Abstract: A catalyst for catalyzing transesterification of esters or esterification of fatty acids, the catalyst is selected from the group consisting of manganese (II) glycerolate, cobalt (II) glycerolate, iron (II) glycerolate, and any combination thereof. A method for transesterification reaction, includes: a) providing a catalyst, wherein the catalyst is selected from the group consisting of manganese (II) glycerolate, cobalt (II) glycerolate, iron (II) glycerolate, and any combination thereof; b) adding the catalyst, one or more alcohols, and a composition comprising one or more esters to a reactor to form a reaction mixture; and c) stirring while heating the reaction mixture for reaction to form transesterification products.
    Type: Application
    Filed: March 14, 2018
    Publication date: September 20, 2018
    Inventors: Ka-fu YUNG, Wing-tak WONG, Tsz-lung KWONG, Pak-chung LAU
  • Methods and catalysts for green biodiesel production from unrefined low grade feedstock
    Patent number: 9694350
    Abstract: This invention provides a catalyst comprising a new form of ZnFe2O4 spinel nanoparticles, and a method for preparing same. The catalyst is useful for catalyzing the esterification of fatty acids or transesterification of triglycerides, wherein the reaction rate and conversion can be enhanced by free fatty acids.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: July 4, 2017
    Assignee: The Hong Kong Polytechnic University
    Inventors: Ka Fu Yung, Wing Tak Wong, Tsz Lung Kwong
  • METHODS AND CATALYSTS FOR GREEN BIODIESEL PRODUCTION FROM UNREFINED LOW GRADE FEEDSTOCK
    Publication number: 20160279616
    Abstract: This invention provides a catalyst comprising a new form of ZnFe2O4 spinel nanoparticles, and a method for preparing same. The catalyst is useful for catalyzing the esterification of fatty acids or transesterification of triglycerides, wherein the reaction rate and conversion can be enhanced by free fatty acids.
    Type: Application
    Filed: March 23, 2016
    Publication date: September 29, 2016
    Inventors: Ka Fu YUNG, Wing Tak WONG, Tsz Lung KWONG