Patents by Inventor Youchang Xiao

Youchang Xiao 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).

  • Polyimide membranes and their preparation
    Patent number: 8772417
    Abstract: Disclosed are (1) a method of preparing a polyimide membrane, including cross-linking polyimides via thermal labile side chains and decomposition of the thermal labile side chains; and (2) polyimide membranes thus prepared.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: July 8, 2014
    Assignee: National University of Singapore
    Inventors: Youchang Xiao, Tai-Shung Chung, Mei Ling Chua, Mohammad Askari, Rui Chin Ong
  • Preparation of Zeolitic Imidazolate Frameworks (ZIFs) - Polybenzimidazole Mixed-Matrix Composite and Application for Gas and Vapor Separation
    Publication number: 20130305920
    Abstract: The present invention presents a mixed-matrix composite material comprising a continuous phase and zeolitic imidazolate framework (ZIF) particles dispersed in the continuous phase, wherein the continuous phase is polybenzimidazole (PBI), methods for making the mixed-matrix composite material, and methods for separating gas or vapor from a mixture of gases or vapors using the mixed-matrix composite material.
    Type: Application
    Filed: February 6, 2012
    Publication date: November 21, 2013
    Applicant: NATIONAL UNIVERSITY OF SINGAPORE
    Inventors: Tingxu Yang, Youchang Xiao, Tai-Shung Chung
  • UV-REARRANGED PIM-1 POLYMERIC MEMBRANES AND A PROCESS OF PREPARING THEREOF
    Publication number: 20130247756
    Abstract: The present invention relates to UV-rearranged PIM-1 polymeric membranes that can be used for advanced hydrogen purification and production. The present invention also relates to a process of preparing UV-rearranged PIM-1 polymeric membranes. The present invention further relates to a method of separating gas mixtures using the UV-rearranged PIM-1 polymeric membranes of the present invention.
    Type: Application
    Filed: February 15, 2013
    Publication date: September 26, 2013
    Applicant: NATIONAL UNIVERSITY OF SINGAPORE
    Inventors: Fuyun Li, Youchang Xiao, Tai-Shung Neal Chung
  • POLYIMIDE MEMBRANES AND THEIR PREPARATION
    Publication number: 20130046057
    Abstract: Disclosed are (1) a method of preparing a polyimide membrane, including cross-linking polyimides via thermal labile side chains and decomposition of the thermal labile side chains; and (2) polyimide membranes thus prepared.
    Type: Application
    Filed: April 12, 2011
    Publication date: February 21, 2013
    Applicant: NATIONAL UNIVERSITY OF SINGAPORE
    Inventors: Youchang Xiao, Tai-Shung Chung, Mei Ling Chua, Mohammad Askari, Rui Chin Ong