Patents by Inventor Yiu-Suk Lee

Yiu-Suk Lee 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 prostaglandin derivatives and starting materials for the same
    Patent number: 7345181
    Abstract: The present invention provides a process for preparing benzoprostacycline derivatives of formula (1), i.e. 5,6,7-trinor-4,8-inter-m-phenylene PGI2 derivatives, and vinyl tin compounds of formula (III) as starting materials for the same.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: March 18, 2008
    Assignee: Yonsung Fine Chemical Co., Ltd.
    Inventors: Yong-Hyun Kim, Yiu-Suk Lee
  • Process for preparing prostaglandin derivatives and stereospecific starting material thereof
    Patent number: 6989458
    Abstract: The present invention relates to a process for effectively preparing prostaglanin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: January 24, 2006
    Assignee: Yonsung Fine Chemical Co.
    Inventors: Won-Hun Ham, Chang-Young Oh, Yong-Hyun Kim, Yiu-Suk Lee, Kee-Young Lee
  • Process for preparing prostaglandin derivatives and starting materials for the same
    Publication number: 20050272943
    Abstract: The present invention provides a process for preparing benzoprostacycline derivatives of formula (1), i.e. 5,6,7-trinor-4,8-inter-m-phenylene PGI2 derivatives, and vinyl tin compounds of formula (III) as starting materials for the same.
    Type: Application
    Filed: September 18, 2003
    Publication date: December 8, 2005
    Applicant: Yonsung Fine Chemical Co., Ltd.
    Inventors: Yong-Hyun Kim, Yiu-Suk Lee
  • Process for preparing prostaglandin derivatives and stereospecific starting material thereof
    Publication number: 20050192451
    Abstract: The present invention relates to a process for effectively preparing prostaglanin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Application
    Filed: December 22, 2004
    Publication date: September 1, 2005
    Inventors: Won-Hun Ham, Chang-Young Oh, Yong-Hyun Kim, Yiu-Suk Lee, Kee-Young Lee
  • Process for preparing sulfamoyl-substituted phenethylamine derivatives
    Patent number: 6914159
    Abstract: The present invention relates to a novel process for preparing sulfamoyl-substituted phenethylamine derivatives, specifically, 5-{2-[2-(2-alkoxy-phenoxy)ethylamino]-propyl}-2-methoxy-benzene sulfonamide of the formula (1).
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: July 5, 2005
    Assignee: Yonsung Fine Chemical Co., Ltd.
    Inventors: Won Hun Ham, Chang Young Oh, Kee Young Lee, Yong Hyun Kim, Yiu Suk Lee
  • Process for preparing prostalglandin derivatives and stereospecific starting material thereof
    Patent number: 6852880
    Abstract: The present invention relates to a process for effectively preparing prostaglandin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: February 8, 2005
    Assignee: Yonsung Fine Chemical Co.
    Inventors: Won-Hun Ham, Chang-Young Oh, Kee-Young Lee, Yong-Hyun Kim, Yiu-Suk Lee
  • Process for preparing prostalglandin derivatives and stereospecific starting material thereof
    Publication number: 20040116693
    Abstract: The present invention relates to a process for effectively preparing prostaglandin derivatives and to a stereospecific alkyl halide containing 15S-alcohol group as a starting material.
    Type: Application
    Filed: October 24, 2003
    Publication date: June 17, 2004
    Inventors: Won-Hun Ham, Chang-Young Oh, Kee-Young Lee, Yong-Hyun Kim, Yiu-Suk Lee