Patents by Inventor Datong Liu

Datong Liu 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 preparating an anemone raddeana extract and the pharmaceutical composition containing the same as well as use thereof
    Publication number: 20040067263
    Abstract: The present invention discloses a method for preparing Anemone Raddeana extract, comprising the following steps: a) pulverizing a rhizome, stem, leaf, flower, and fruit of Anemone Raddeana to obtain crude powders of Anemone Raddeana; b) extracting the crude powders of Anemone Raddeana with an ethanol solution, filtering, and recovering the ethanol; c) absorbing by a macroporous absorbing resin, removing pigments and saccharides, then eluting the resin until colorless with water or aqueous alkali solution, thus the fraction of saponin is retained in tile column; d) eluting with 50˜70% ethanol, recovering tile ethanol, adding gelatin, filtering precipitate, decoloring with decolor macroporous resin, eluting with 50˜70% ethanol, recovering the ethanol, concentrating and drying to obtain crude saponins of Anemone Raddeana. The present invention further relates to a method for extracting Raddeanin A. The method of the invention is convenient and suitable for industrial production.
    Type: Application
    Filed: October 15, 2003
    Publication date: April 8, 2004
    Inventors: Dayou Liu, Datong Liu, Jinwen Qiu, Dafang Zhang, Hongke Li, Yifeng Liu