Patents by Inventor Jiefeng Pan

Jiefeng Pan 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).

  • Method for extracting and purifying Dendrobium officinale polysaccharides
    Patent number: 11780936
    Abstract: A method for extracting and purifying Dendrobium officinale polysaccharides comprises following steps: (1) fully disperse Dendrobium officinale powder in pure water to obtain crude liquid; (2) removing insoluble impurities from the crude liquid through a microfiltration membrane to obtain permeate 1 and retentate 1; (3) performing macroporous ultrafiltration treatment of the permeate 1 and collect permeate 2 and retentate 2; (4) adding an aqueous solution of edible alkali metal inorganic salt to the retentate 2, fully stirring and dissolving to obtain polysaccharide crude liquid, performing macroporous ultrafiltration treatment and collecting permeate 3 and retentate 3; (5) combining the permeate 2 and permeate 3, adding the combined permeate into an electrodialysis device for desalination, and collecting dilute solution and concentrated solution; (6) performing microporous ultrafiltration treatment of the dilute solution and collect retentate 4 and permeate 4; (7) carrying out freeze-drying of the retentate
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: October 10, 2023
    Assignee: Zhejiang University of Technology
    Inventors: Ping Shao, Peiyu Qian, Jiefeng Pan, Peilong Sun
  • METHOD FOR EXTRACTING AND PURIFYING DENDROBIUM OFFICINALE POLYSACCHARIDES
    Publication number: 20210332157
    Abstract: A method for extracting and purifying Dendrobium officinale polysaccharides comprises following steps: (1) fully disperse Dendrobium officinale powder in pure water to obtain crude liquid; (2) removing insoluble impurities from the crude liquid through a microfiltration membrane to obtain permeate 1 and retentate 1; (3) performing macroporous ultrafiltration treatment of the permeate 1 and collect permeate 2 and retentate 2; (4) adding an aqueous solution of edible alkali metal inorganic salt to the retentate 2, fully stirring and dissolving to obtain polysaccharide crude liquid, performing macroporous ultrafiltration treatment and collecting permeate 3 and retentate 3; (5) combining the permeate 2 and permeate 3, adding the combined permeate into an electrodialysis device for desalination, and collecting dilute solution and concentrated solution; (6) performing microporous ultrafiltration treatment of the dilute solution and collect retentate 4 and permeate 4; (7) carrying out freeze-drying of the retentate
    Type: Application
    Filed: September 2, 2020
    Publication date: October 28, 2021
    Inventors: Ping Shao, Peiyu Qian, Jiefeng Pan, Peilong Sun