Patents by Inventor Wallace W. Leung

Wallace W. 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).

  • Nanofiber filter facemasks and cabin filters
    Patent number: 8303693
    Abstract: A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: November 6, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventor: Wallace W. Leung
  • NANOFIBER FILTER FACEMASKS AND CABIN FILTERS
    Publication number: 20080264259
    Abstract: A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.
    Type: Application
    Filed: April 26, 2007
    Publication date: October 30, 2008
    Inventor: Wallace W. Leung