Patents by Inventor Wing Ho CHOI

Wing Ho CHOI 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).

  • Self-healing material and preparation process thereof
    Patent number: 9713801
    Abstract: The present application provides a self-healing material which comprises silica sol as self-healing agent encapsulated by a polymeric shell. The self-healing material may be further embedded in a concrete mixture to heal micro-cracks in concrete. A method for preparing the self-healing material is also provided.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: July 25, 2017
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Lok Hang Keung, Noel Peter Bengzon Tan, Wing Ho Choi, Wai Chak Lam
  • SELF-HEALING MATERIAL AND PREPARATION PROCESS THEREOF
    Publication number: 20170128903
    Abstract: The present application provides a self-healing material which comprises silica sol as self-healing agent encapsulated by a polymeric shell. The self-healing material may be further embedded in a concrete mixture to heal micro-cracks in concrete. A method for preparing the self-healing material is also provided.
    Type: Application
    Filed: January 24, 2017
    Publication date: May 11, 2017
    Inventors: Lok Hang Keung, Noel Peter Bengzon Tan, Wing Ho Choi, Wai Chak Lam
  • Self-healing material and preparation process thereof
    Patent number: 9598313
    Abstract: The present application provides a self-healing material which comprises silica sol as self-healing agent encapsulated by a polymeric shell. The self-healing material may be further embedded in a concrete mixture to heal micro-cracks in concrete. A method for preparing the self-healing material is also provided.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: March 21, 2017
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Lok Hang Keung, Noel Peter Bengzon Tan, Wing Ho Choi, Wai Chak Lam
  • Non-vacuum method of manufacturing light-absorbing materials for solar cell application
    Patent number: 9243340
    Abstract: The present invention describes a method of producing a p-type light-absorbing semiconductor copper zinc tin selenide/sulfide (Cu2(ZnxSn2-x)(SySe1-y)4) (abbreviated CZTS) with electrochemical deposition. It can be used in the production of solar cell when combined with an n-type inorganic or an organic semiconductor layer. The present method comprises a one-step or a sequence of depositions using electroplating to fabricate a low-cost and large-area CZTS solar cell, without using expensive and complicated deposition techniques or highly toxic and flammable chemicals in the production process. The present method significantly reduces the cost and energy requirement for production of solar cell.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: January 26, 2016
    Assignee: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Kam Piu Ho, Paul Kwok Keung Ho, Man Wah Liu, Ranshi Wang, Wai Chun Luk, Wing Ho Choi, Fulin Zheng, Kwong Chau Kwok, Mei Mei Hsu, Ivan Ka Yu Lau
  • SELF-HEALING MATERIAL AND PREPARATION PROCESS THEREOF
    Publication number: 20150344365
    Abstract: The present application provides a self-healing material which comprises silica sol as self-healing agent encapsulated by a polymeric shell. The self-healing material may be further embedded in a concrete mixture to heal micro-cracks in concrete. A method for preparing the self-healing material is also provided.
    Type: Application
    Filed: May 28, 2015
    Publication date: December 3, 2015
    Inventors: Lok Hang Keung, Noel Peter Bengzon Tan, Wing Ho Choi, Wai Chak Lam
  • NON-VACUUM METHOD OF MANUFACTURING LIGHT-ABSORBING MATERIALS FOR SOLAR CELL APPLICATION
    Publication number: 20140251435
    Abstract: The present invention describes a method of producing a p-type light-absorbing semiconductor copper zinc tin selenide/sulfide (Cu2(ZnxSn2-x)(SySe1-y)4) (abbreviated CZTS) with electrochemical deposition. It can be used in the production of solar cell when combined with an n-type inorganic or an organic semiconductor layer. The present method comprises a one-step or a sequence of depositions using electroplating to fabricate a low-cost and large-area CZTS solar cell, without using expensive and complicated deposition techniques or highly toxic and flammable chemicals in the production process. The present method significantly reduces the cost and energy requirement for production of solar cell.
    Type: Application
    Filed: February 12, 2014
    Publication date: September 11, 2014
    Applicant: Nano and Advanced Materials Institute Limited
    Inventors: Kam Piu HO, Paul Kwok Keung HO, Man Wah LIU, Ranshi WANG, Wai Chun LUK, Wing Ho CHOI, Fulin ZHENG, Kwong Chau KWOK, Mei Mei HSU, Ivan Ka Yu LAU