Patents by Inventor Mei-yi Leung

Mei-yi 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).

  • Patent number: 12239014
    Abstract: A novel class of gold (III) compounds with thermally stimulated delayed phosphorescence (TSDP) properties, methods of making and use thereof are disclosed. The gold (III) compound includes a triazine-containing cyclometalating tridentate ligand and one auxiliary ligand, both coordinated to a gold (III) metal center. The gold (III) compounds can be used as light-emitting material for fabrication of OLEDs. A novel concept of TSDP to harvest light emission from the higher energy triplet excited state via the up-conversion from the lowest-energy triplet excited state by efficient spin-allowed reverse internal conversion is also disclosed.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: February 25, 2025
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Vivian Wing-Wah Yam, Man-Chung Tang, Ming-Yi Leung, Shiu-Lun Lai, Mei-Yee Chan
  • Patent number: 7531203
    Abstract: A method for the production of a conductive flexible textile array. The method includes the application of an oxidizing agent to selected areas of the textile; coating the textile with pyrrole by vapor deposition to form a conductive coated textile having a polypyrrole network; stabilizing the conductive coated textile; and forming the conductive flexible textile arrays as a sensor. With this method of production, the degree of polymerization of the conjugated polymer, the morphology and the rate of the capacitance delay is carefully controlled. As such, stable flexible textile sensors are produced with various levels of sensitivities and conductivities which are particularly useful for designed applications.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: May 12, 2009
    Assignee: The Hong Kong Polytechnic University
    Inventors: Xiaoming Tao, Sarah Mei-Yi Leung, Marcus Chun-Wah Yuen, Wing-Yin Kwok, Hoi-Lut Ho
  • Patent number: 7510745
    Abstract: Polypyrrole (PPy) is one of the most commonly studied conducting polymers due to its good stability, high conductivity, ease of preparation and non-toxicity. The stability of the conductivity of polypyrrole films depends on the choice of dopant anion, the method of preparation, and the conditions of aging. Most of the existing methods only improve stability by sacrificing conductivity, as well as sensitivity. This invention provides a method for coating conducting polymer onto a substrate by first applying an anionic dopant and an oxidizing agent onto the substrate. The monomer is then allowed to form the conducting polymer at about ?10 to ?80° C. for a sufficient period of time. After storage for a long period of time (nearly a year), the conductive polymer coating still retains almost the same strain sensitivity and at least up to 85% of its initial conductivity.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: March 31, 2009
    Assignee: The Hong Kong Polytechnic University
    Inventors: Xiao-ming Tao, Mei-yi Leung, Yang Li, Xiao-yin Cheng, Joanna Tsang, Chun-wah Marcus Yuen
  • Publication number: 20070065586
    Abstract: Polypyrrole (PPy) is one of the most commonly studied conducting polymers due to its good stability, high conductivity, ease of preparation and non-toxicity. The stability of the conductivity of polypyrrole films depends on the choice of dopant anion, the method of preparation, and the conditions of aging. Most of the existing methods only improve stability by sacrificing conductivity, as well as sensitivity. This invention provides a method for coating conducting polymer onto a substrate by first applying an anionic dopant and an oxidizing agent onto the substrate. The monomer is then allowed to form the conducting polymer at about ?10 to ?80° C. for a sufficient period of time. After storage for a long period of time (nearly a year), the conductive polymer coating still retains almost the same strain sensitivity and at least up to 85% of its initial conductivity.
    Type: Application
    Filed: September 9, 2005
    Publication date: March 22, 2007
    Applicant: The Hong Kong Polytechnic University
    Inventors: Xiao-ming Tao, Mei-yi Leung, Yang Li, Xiao-yin Cheng, Joanna Tsang, Chun-wah Yuen