Patents by Inventor Shi Biao Li

Shi Biao Li 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: 7662364
    Abstract: This invention reports a drug for hyperphospheremia and its preparative method. The preparation includes active constituents, lanthanum polystyrene sulfonate, and excipients. The preparative method in the invention can be summarized as follows: Polystyrene sulfonic acid is obtained by treating polystyrene sulfosalt with hydrochloric acid, soaked or eluted with water soluble lanthanum-contained solution, and washed with water till its PH is neutral. Then, the lanthanum polystyrene sulfonate solution is washed till the superfluous La? unexchanged is washed out. Lanthanum polystyrene sulfonate is taken out and crushed to powder after being dried. The lanthanum polystyrene sulfonate, whose weight percentage of lanthanum is 14-22%, is used as active constituents to prepare gastrointestinal tract preparations together with general amount of excipients with routine preparative method.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: February 16, 2010
    Inventors: Shi Biao Li, Min Qiao, Wei Sheng Zhang
  • Publication number: 20090016984
    Abstract: This invention reports a drug for hyperphospheremia and its preparative method. The preparation includes active constituents, lanthanum polystyrene sulfonate, and excipients. The preparative method in the invention can be summarized as follows: Polystyrene sulfonic acid is obtained by treating polystyrene sulfosalt with hydrochloric acid, soaked or eluted with water soluble lanthanum-contained solution, and washed with water till its PH is neutral. Then, the lanthanum polystyrene sulfonate solution is washed till the superfluous La? unexchanged is washed out. Lanthanum polystyrene sulfonate is taken out and crushed to powder after being dried. The lanthanum polystyrene sulfonate, whose weight percentage of lanthanum is 14-22%, is used as active constituents to prepare gastrointestinal tract preparations together with general amount of excipients with routine preparative method.
    Type: Application
    Filed: June 26, 2006
    Publication date: January 15, 2009
    Inventors: Shi Biao Li, Min Qiao, Wei Sheng Zhang