Patents by Inventor Hohyung Ryu

Hohyung Ryu 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 preparing rosuvastatin, intermediate compounds useful for preparing same, and method for preparing same
    Patent number: 8524914
    Abstract: The present invention relates to novel intermediate compounds used in preparing Rosuvastatin or the pharmaceutically acceptable salts thereof, to a method for preparing same, and to a method for preparing Rosuvastatin or the pharmaceutically acceptable salts thereof from the intermediates. The preparation method of the present invention has the effect of providing Rosuvastatin hemi-calcium salts with an excellent yield rate.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: September 3, 2013
    Assignee: Chong Kun Dang Pharmaceutical Corp.
    Inventors: Hongwoo Lee, Daejong Park, Choongleol Yoo, Donghyuk Nam, Hohyung Ryu, Dongjin Kim
  • NOVEL METHOD FOR PREPARING ROSUVASTATIN, INTERMEDIATE COMPOUNDS USEFUL FOR PREPARING SAME, AND METHOD FOR PREPARING SAME
    Publication number: 20120136151
    Abstract: The present invention relates to novel intermediate compounds used in preparing Rosuvastatin or the pharmaceutically acceptable salts thereof, to a method for preparing same, and to a method for preparing Rosuvastatin or the pharmaceutically acceptable salts thereof from the intermediates. The preparation method of the present invention has the effect of providing Rosuvastatin hemi-calcium salts with an excellent yield rate.
    Type: Application
    Filed: April 8, 2010
    Publication date: May 31, 2012
    Inventors: Hongwoo Lee, Daejong Park, Choongleol Yoo, Donghyuk Nam, Hohyung Ryu, Dongjin Kim