Patents by Inventor Zhengbing TONG

Zhengbing TONG 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 separating ginkgolides
    Patent number: 9084755
    Abstract: A method for extracting and separating ginkgolides. The ginkgolides obtained through steps of extraction on a ginkgo leaf, further extraction, column chromatography, crystallization, and crystal mixing comprise 25.0% to 50.0% of bilobalide (C15H18O8), 20.0% to 45.0% of ginkgolide A (C20H24O9), 10.0% to 30.0% of ginkgolide B (C20H24O10), and 5.0% to 15.0% of ginkgolide C (C20H24O11). The total quantity of the bilobalide, the ginkgolide A, the ginkgolide B, and the ginkgolide C is over 95%.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: July 21, 2015
    Assignee: CHENGDU BAIYU TECHNOLOGY PHARMACY CO., LTD.
    Inventors: Yi Sun, Yonghong Zhu, Zhengbing Tong, Jie Wang
  • METHOD FOR EXTRACTING AND SEPARATING GINKGOLIDES
    Publication number: 20150044311
    Abstract: A method for extracting and separating ginkgolides. The ginkgolides obtained through steps of extraction on a ginkgo leaf, further extraction, column chromatography, crystallization, and crystal mixing comprise 25.0% to 50.0% of bilobalide (C15H18O8), 20.0% to 45.0% of ginkgolide A (C20H24O9), 10.0% to 30.0% of ginkgolide B (C20H24O10), and 5.0% to 15.0% of ginkgolide C (C20H24O11). The total quantity of the bilobalide, the ginkgolide A, the ginkgolide B, and the ginkgolide C is over 95%.
    Type: Application
    Filed: October 23, 2014
    Publication date: February 12, 2015
    Inventors: Yi SUN, Yonghong ZHU, Zhengbing TONG, Jie WANG