Patents by Inventor Byoung Taik Choi

Byoung Taik Choi 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 preparing acarbose with high purity
    Patent number: 6649755
    Abstract: Disclosed herein is a process for preparing highly pure acarbose of formula (I) useful as medicine for the treatment of diabetes. The disclosed process comprises prepurifying an acarbose-containing solution using a synthetic adsorbent to produce a prepurified acarbose having an acarbose content of a predetermined level or more; and contacting the prepurified acarbose with a monodispersed, strongly acid cation exchanger, in one step, to absorb acarbose.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: November 18, 2003
    Assignee: Chong Kun Dang Pharmaceutical Corp.
    Inventors: Chung Il Hong, Kyung Hwan Kim, Byoung Taik Choi, Gang Sun Choi, Yong Rack Choi