Patents by Inventor Yanbao ZHOU

Yanbao ZHOU 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: 11008357
    Abstract: Disclosed is a method for preparing a canagliflozin form. The method comprises the following steps: adding canagliflozin into an organic solvent and dissolving same, then distilling into a certain amount of an oil; then, adding an anti-solvent to the oil, stirring same with a precipitated solid, cooling, filtering, and drying to obtain the canagliflozin amorphous form. The preparation method has the characteristics of a low solvent ratio, a high yield, a simple operation, easy recovery, less three wastes and good producibility, with the resulting product having a stable quality, good fluidity, and being suitable for the preparation of formulations, etc., and the preparation process is easy to apply to large commercial production, and has a high value in terms of promotion and application.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: May 18, 2021
    Inventors: Gang Qian, Yanbao Zhou, Linxiang Zhang, Wenling Zhang
  • Publication number: 20200165284
    Abstract: Disclosed is a method for preparing a canagliflozin form. The method comprises the following steps: adding canagliflozin into an organic solvent and dissolving same, then distilling into a certain amount of an oil; then, adding an anti-solvent to the oil, stirring same with a precipitated solid, cooling, filtering, and drying to obtain the canagliflozin amorphous form. The preparation method has the characteristics of a low solvent ratio, a high yield, a simple operation, easy recovery, less three wastes and good producibility, with the resulting product having a stable quality, good fluidity, and being suitable for the preparation of formulations, etc., and the preparation process is easy to apply to large commercial production, and has a high value in terms of promotion and application.
    Type: Application
    Filed: February 6, 2018
    Publication date: May 28, 2020
    Inventors: Gang QIAN, Yanbao ZHOU, Linxiang ZHANG, Wenling ZHANG