Patents by Inventor Shizhang Cui

Shizhang Cui 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).

  • Preparation method for fumaric acid pour point depressant for crude oil
    Patent number: 11384185
    Abstract: A fumaric acid pour point depressant for crude oil and a preparation method therefor are provided. The fumaric acid pour point depressant is obtained by polymerizing a first prepolymer, a second prepolymer, a third monomer and a fourth monomer, where the first prepolymer is obtained by pre-polymerizing vinyl acetate and a first monomer; and the second prepolymer is obtained by pre-polymerizing fumaric acid and a second monomer.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: July 12, 2022
    Assignees: DESHI ENERGY TECHNOLOGY GROUP CO., LTD., SHANDONG DESHI CHEMICAL COMPANY LIMITED
    Inventors: Shizhang Cui, Zongming Xiu, Liming Wang, Xinwang Song, Ruimei Gao, Yunfu Hou, Zhifeng Lv