Patents by Inventor Changyu Long

Changyu Long 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).

  • OXIDATION-RESISTANT COMPOSITE REVERSE OSMOSIS MEMBRANE
    Publication number: 20080203013
    Abstract: Disclosed is a oxidation resistant composite reverse osmosis membrane, comprising a porous support and a polyamide layer, in which the polyamide layer is modified by an agent so that the membrane retains a salt rejection of at least 85% after being subjected to an aqueous solution of NaClO having a concentration of about 2,000 to 30,000 ppm for about one hour. A process of preparing the membrane is also disclosed.
    Type: Application
    Filed: August 27, 2007
    Publication date: August 28, 2008
    Applicant: VONTRON MEMBRANE TECHNOLOGY CO., LTD.
    Inventors: Xiaoyang Zhao, Yaohua He, Zongce Wu, Zhiqi Cai, Siliang Wang, Changyu Long, Feng Liu