Patents by Inventor Mingqin Dai

Mingqin Dai 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).

  • Patent number: 11470861
    Abstract: Preparation method and application of astaxanthin H1-, or H2- or J-aggregate water dispersion system are provided. The three kind of color-different astaxanthin multimer nano-dispersion systems utilize a special molecular structure of natural biomacromolecule chitosan and fish sperm DNA as well as physical interaction between macromolecules to induce formation and stability of astaxanthin multimers under solvent and salt ion-effects. Low-toxicity ethanol is selected as a good solvent for astaxanthin. The organic solvent can be completely removed in the later stage of the preparation process, and can be further enriched and recycled, which is beneficial to clean production and low cost. By adjusting process parameters, the H1-, or H2- or J-type astaxanthin aggregate water dispersion system can be obtained, so as to control a coloration range of astaxanthin water-based products to be yellow, orange and pink.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: October 18, 2022
    Assignee: OCEAN UNIVERSITY OF CHINA
    Inventors: Changhu Xue, Jing Li, Mingqin Dai, Yaoguang Chang, Xingguo Liang, Jie Xu, Lu Yang
  • Publication number: 20200008446
    Abstract: Preparation method and application of astaxanthin H1-, or H2- or J-aggregate water dispersion system are provided. The three kind of color-different astaxanthin multimer nano-dispersion systems utilize a special molecular structure of natural biomacromolecule chitosan and fish sperm DNA as well as physical interaction between macromolecules to induce formation and stability of astaxanthin multimers under solvent and salt ion-effects. Low-toxicity ethanol is selected as a good solvent for astaxanthin. The organic solvent can be completely removed in the later stage of the preparation process, and can be further enriched and recycled, which is beneficial to clean production and low cost. By adjusting process parameters, the H1-, or H2- or J-type astaxanthin aggregate water dispersion system can be obtained, so as to control a coloration range of astaxanthin water-based products to be yellow, orange and pink.
    Type: Application
    Filed: September 17, 2019
    Publication date: January 9, 2020
    Inventors: Changhu Xue, Jing Li, Mingqin Dai, Yaoguang Chang, Xingguo Liang, Jie Xu, Lu Yang