Patents by Inventor Laurentia Setiawan

Laurentia Setiawan 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).

  • Nanofiltration membrane and method of manufacturing a nanofiltration membrane
    Patent number: 10525423
    Abstract: A nanofiltration membrane comprising a selective layer comprising or consisting of poly(amide-imide) cross-linked with polyallylamine is provided. A method of manufacturing a nanofiltration membrane and use of a nanofiltration membrane in a water softening process that is carried out at a low pressure of less than about 2 bar are also provided.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: January 7, 2020
    Assignees: Nanyang Technological University, Evoqua Water Technologies Pte. Ltd.
    Inventors: Rong Wang, Lei Shi, Laurentia Setiawan
  • NANOFILTRATION MEMBRANE AND METHOD OF MANUFACTURING A NANOFILTRATION MEMBRANE
    Publication number: 20160303522
    Abstract: A nanofiltration membrane comprising a selective layer comprising or consisting of poly(amide-imide) cross-linked with polyallyamine is provided. A method of manufacturing the nanofiltration membrane and use of the nanofiltration membrane in a water softening process that is carried out at a low pressure of less than about 2 bar is also provided.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 20, 2016
    Inventors: Rong Wang, Lei Shi, Laurentia Setiawan
  • FORWARD OSMOSIS HOLLOW FIBER MEMBRANE
    Publication number: 20140008292
    Abstract: Present invention relates to a method for forming a nanofiltration hollow fiber membrane comprising a poly(amide-imide) (PAI) hollow fiber substrate having a polyethyleneimine (PEI)-cross-linked PAI surface layer. This membrane is suitable for forward osmosis applications. The method comprises contacting the PAI hollow fiber substrate with an aqueous solution of polyethyleneimine (PEI) under conditions suitable for cross-linking PAI in the surface layer of the PAI hollow fiber substrate by PEI.
    Type: Application
    Filed: November 28, 2011
    Publication date: January 9, 2014
    Applicant: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Rong Wang, Laurentia Setiawan, Anthony G. Fane