Patents by Inventor Qundan ZHANG

Qundan ZHANG 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).

  • Ester polymer, preparation method therefor and use thereof
    Patent number: 11440982
    Abstract: An ester polymer has a structure represented by the following formula (I): T represents the backbone of the ester polymer; the group B is each independently selected from O or S; the group R each independently represents C1-10 hydrocarbylene group; the group A is each independently selected from O, S or NR?; the group R? each independently represents C1-10 hydrocarbylene group; the group Nb is each independently selected from H or —R??—B?H, wherein at least one of the two Nb on the same nitrogen atom is —R??—B?H; the group R? is each independently selected from H or C1-10 hydrocarbyl group; the group R?? each independently represents C1-10 hydrocarbylene group; the group B? is each independently selected from O or S; each y independently represents an integer between 1 and 6; and m is an integer between 1 and 10.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 13, 2022
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING. SINOPEC
    Inventors: Cheng Li, Songbai Tian, Xiaowei Wang, Qundan Zhang, Hu Li, Xinyu Zhu
  • ESTER POLYMER, PREPARATION METHOD THEREFOR AND USE THEREOF
    Publication number: 20200181300
    Abstract: An ester polymer according to the present application has a structure represented by the following formula (I): represents the backbone of the ester polymer; the group B is each independently selected from O or S; the group R each independently represents C1-10 hydrocarbylene group; the group A is each independently selected from O, S or NR?; the group R? each independently represents C1-10 hydrocarbylene group; the group Nb is each independently selected from H or —R??—B?H, wherein at least one of the two Nb on the same nitrogen atom is —R??—B?H; the group R? is each independently selected from H or C1-10 hydrocarbyl group; the group R?? each independently represents C1-10 hydrocarbylene group; the group B? is each independently selected from O or S; each y independently represents an integer between 1 and 6; and m is an integer between 1 and 10.
    Type: Application
    Filed: May 16, 2018
    Publication date: June 11, 2020
    Inventors: Cheng LI, Songbai TIAN, Xiaowei WANG, Qundan ZHANG, Hu LI, Xinyu ZHU