Patents by Inventor Alexander Man-Chung Leung

Alexander Man-Chung 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).

  • Cathode electrode design for electrochemical fuel cells
    Patent number: 11239471
    Abstract: A membrane electrode assembly including: an anode electrode; a cathode electrode; and a polymer electrolyte membrane; wherein the cathode includes a first cathode catalyst sublayer including a first precious metal catalyst composition and a first ionomer composition including a first ionomer and a second ionomer; and a second cathode catalyst sublayer including a second precious metal catalyst composition and a second ionomer composition including a third ionomer; wherein the first ionomer is different from the second ionomer in at least one of chemical structure and equivalent weight.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 1, 2022
    Assignee: BALLARD POWER SYSTEMS INC.
    Inventors: Siyu Ye, Alexander Man-Chung Leung, Kyoung Bai, Dustin William H. Banham, Alan Young
  • CATHODE ELECTRODE DESIGN FOR ELECTROCHEMICAL FUEL CELLS
    Publication number: 20200036012
    Abstract: A membrane electrode assembly including: an anode electrode; a cathode electrode; and a polymer electrolyte membrane; wherein the cathode includes a first cathode catalyst sublayer including a first precious metal catalyst composition and a first ionomer composition including a first ionomer and a second ionomer; and a second cathode catalyst sublayer including a second precious metal catalyst composition and a second ionomer composition including a third ionomer; wherein the first ionomer is different from the second ionomer in at least one of chemical structure and equivalent weight.
    Type: Application
    Filed: September 29, 2017
    Publication date: January 30, 2020
    Inventors: Siyu YE, Alexander Man-Chung LEUNG, Kyoung BAI, Dustin William H. BANHAM, Alan YOUNG
  • Calendered double side segment coated webs
    Patent number: 6416904
    Abstract: An improved design and manufacturing method is disclosed for calendered, double side segment coated webs. By staggering the leading edges and/or the trailing edges of the segment coatings on one side of the web from those on the other side, web damage, including the incidence of breakage, can be reduced. Further, vibration and wear on the calendering apparatus can be reduced. The invention is particularly useful for heavily calendered webs such as the electrodes in non-aqueous rechargeable lithium ion batteries.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: July 9, 2002
    Assignee: E-One Moli Energy (Canada) Limited
    Inventors: Jan Naess Reimers, Akiyoshi Manabe, Alexander Man-Chung Leung
  • Calendered double side segment coated webs
    Patent number: 6146694
    Abstract: An improved design and manufacturing method is disclosed for calendered, double side segment coated webs. By staggering the leading edges and/or the trailing edges of the segment coatings on one side of the web from those on the other side, web damage, including the incidence of breakage, can be reduced. Further, vibration and wear on the calendering apparatus can be reduced. The invention is particularly useful for heavily calendered webs such as the electrodes in non-aqueous rechargeable lithium ion batteries.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: November 14, 2000
    Assignee: E-One Moli Energy (Canada) Limited
    Inventors: Jan Naess Reimers, Akiyoshi Manabe, Alexander Man-Chung Leung