Patents by Inventor Chiou-Jour Laih

Chiou-Jour Laih 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).

  • Process for purifying pravastatin sodium from a fermentation broth
    Patent number: 6790984
    Abstract: A process for purifying pravastatin sodium comprising the steps of: a. clarifying a fermentation broth containing pravastatin sodium to obtain a clear solution; and adjusting the clear solution to be basic having pH value ranging from pH 10˜13; b. adsorbing the pravastatin sodium with non-ionic resin; eluting the pravastatin sodium by water-soluble organic solvent; and forming a concentrate of pravastatin sodium; c. treating the concentrate with water-soluble anti-solvent or inorganic salt to form a precipitate of pravastatin sodium; and d. recrystallizing the precipitate for making pravastatin sodium crystal with high purity and high yield.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: September 14, 2004
    Assignee: Chunghwa Chemical Synthesis & Biotech Co., Ltd.
    Inventors: Jing-Chen Mai, Chiou-Jour Laih, Yu-Chin Chiang
  • Process for purifying pravastatin sodium from a fermentation broth
    Publication number: 20040167352
    Abstract: A process for purifying pravastatin sodium comprising the steps of:
    Type: Application
    Filed: May 14, 2003
    Publication date: August 26, 2004
    Inventors: Jing-Chen Mai, Chiou-Jour Laih, Yu-Chin Chiang