Patents by Inventor Baijun Liu

Baijun Liu 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).

  • Poly(aryl ether) with pendent sulfonic acid phenyl groups
    Patent number: 7947800
    Abstract: A sulfonated poly(aryl ether) (SPAE) having a poly(aryl ether) (PAE) main chain and a sulfonated phenyl group pendent from the main chain are useful in proton exchange membranes (PEMs), particularly for fuel cells. The pendent phenyl group can provide an easily sulfonable site that may be sulfonated under mild conditions, providing the ability to precisely control the sulfonic acid content of the SPAE.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: May 24, 2011
    Assignee: National Research Council of Canada
    Inventors: Baijun Liu, Michael D. Guiver, Gilles P. Robertson
  • POLY(ARYL ETHER) WITH PENDENT SULFONIC ACID PHENYL GROUPS
    Publication number: 20090203806
    Abstract: A sulfonated poly(aryl ether) (SPAE) having a poly(aryl ether) (PAE) main chain and a sulfonated phenyl group pendent from the main chain are useful in proton exchange membranes (PEMs), particularly for fuel cells. The pendent phenyl group can provide an easily sulfonable site that may be sulfonated under mild conditions, providing the ability to precisely control the sulfonic acid content of the SPAE.
    Type: Application
    Filed: July 13, 2007
    Publication date: August 13, 2009
    Inventors: Baijun Liu, Michael D. Guiver, Gilles P. Robertson