Patents by Inventor Hee Cheol

Hee Cheol 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 of Preparing Clopidogrel and Intermediates Used Therein
    Publication number: 20080214821
    Abstract: Optically pure clopidogrel can be prepared in a high yield by optically resolving a racemic form of the compound of formula (II) using an optically active amine to form the optically active form of the compound of formula (III) or its acid-addition salt; and methylating the compound of formula (III) or its acid-addition salt.
    Type: Application
    Filed: November 28, 2005
    Publication date: September 4, 2008
    Applicant: Hanmi Pharm., Co., Ltd.
    Inventors: Eun Sook Kim, Hee Cheol, Bo Sung Kwon, Sangmin Yun, Mi Young Ko, Cheol Kyung Kim, Kwee Hyun Suh