Patents by Inventor Mohammad Askari

Mohammad Askari 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).

  • Strong Hollow-Fiber Membranes for Saline Desalination and Water Treatment
    Publication number: 20240091714
    Abstract: A thin-film-composite hollow-fiber membrane includes a phase-inversion layer, which is in the form of a hollow fiber, and an active layer coated on the phase-inversion layer. The active layer selectively allows passage of water molecules but rejects at least some dissolved ions. The thin-film-composite hollow-fiber membrane can have an internal burst pressure of at least 4 MPa. In a method for forming the membrane, the polymer concentration in the spinning dope from which the hollow-fiber substrate is formed can have a polymer concentration no greater than 5% below the critical concentration.
    Type: Application
    Filed: February 2, 2022
    Publication date: March 21, 2024
    Applicants: Gradiant Corporation, National University of Singapore
    Inventors: Looh Tchuin Choong, Liang Canzeng, Chung Shung, Mohammad Askari
  • 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
  • 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