Patents by Inventor Fengjuan Zhang

Fengjuan 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).

  • Carboxymethyl inulin graft polymer scale and corrosion inhibitor and preparation method thereof
    Patent number: 11414511
    Abstract: The invention discloses a carboxymethyl inulin graft polymer scale and corrosion inhibitor and a preparation method thereof. The main chain of the carboxymethyl inulin graft polymer scale and corrosion inhibitor consists of the following repeating unit (I): in the repeating unit (I), x:y=(20˜80):(20˜80); the range of z is from 2 to 70, the degree of carboxymethyl substitution is from 1.5 to 2.5. The beneficial effect of the technical scheme proposed in the present invention is: it has excellent scale inhibition and corrosion inhibition properties; the monomers are cheap and easily available; the reaction conditions are mild and easy to control; at the same time, the monomer raw materials don't contain phosphorus and nitrogen, and are environmentally friendly.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: August 16, 2022
    Assignees: YANGTZE UNIVERSITY, PETROCHINA COMPANY LIMITED
    Inventors: Weichu Yu, Aibin Wu, Jingfeng Dong, Zhenhu Lyu, Zhichen Wang, Fengjuan Zhang
  • CARBOXYMETHYL INULIN GRAFT POLYMER SCALE AND CORROSION INHIBITOR AND PREPARATION METHOD THEREOF
    Publication number: 20210198405
    Abstract: The invention discloses a carboxymethyl inulin graft polymer scale and corrosion inhibitor and a preparation method thereof. The main chain of the carboxymethyl inulin graft polymer scale and corrosion inhibitor consists of the following repeating unit (I): in the repeating unit (I), x:y=(20˜80):(20˜80); the range of z is from 2 to 70, the degree of carboxymethyl substitution is from 1.5 to 2.5. The beneficial effect of the technical scheme proposed in the present invention is: it has excellent scale inhibition and corrosion inhibition properties; the monomers are cheap and easily available; the reaction conditions are mild and easy to control; at the same time, the monomer raw materials don't contain phosphorus and nitrogen, and are environmentally friendly.
    Type: Application
    Filed: April 30, 2020
    Publication date: July 1, 2021
    Inventors: Weichu Yu, Aibin Wu, Jingfeng Dong, Zhenhu Lyu, Zhichen Wang, Fengjuan Zhang
  • Oral waterjet
    Patent number: D993395
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: July 25, 2023
    Assignee: CAOXIAN YITIANXING NETWORK TECHNOLOGY CO., LTD.
    Inventor: Fengjuan Zhang