Patents by Inventor Jeong-il Yu

Jeong-il Yu 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).

  • Amphiphilic block copolymer and polymeric composition comprising the same for drug delivery
    Patent number: 8349306
    Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: January 8, 2013
    Assignee: Samyang Biopharmaceuticals Corporation
    Inventors: Min Hyo Seo, Sa-Won Lee, Myung-Han Hyun, Jeong-Il Yu, Dong-Hoon Chang, Hye-Jeong Yoon, Jeong-Kyung Kim
  • Polymeric micelle compositions with improved stability and methods of making thereof
    Patent number: 7879317
    Abstract: Polymeric compositions capable of forming stable micelles in an aqueous solution, comprising an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block, and a polylactic acid derivative wherein one end of the polylactic acid is covalently bound to at least one carboxyl group. The carboxyl group of the polylactic acid derivative may be fixed with a di- or tri-valent metal ion, obtained by adding the di- or tri-valent metal ion to the polymeric composition.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: February 1, 2011
    Assignee: Samyang Corporation
    Inventors: Min-Hyo Seo, Sa-Won Lee, Hee-Jo Kim, Jeong-Kyung Kim, Myung-Han Huyn, Jeong-il Yu, Bong-Oh Kim
  • Delivery System For Bioactive Agents on the Basis of a Polymeric Drug Carrier Comprising an Amphiphilic Block Polymer and a Polylacticacid Derivative
    Publication number: 20080260850
    Abstract: Delivery system for bioactive agents on the basis of a polymeric drug carrier formed from compositions comprising an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block having a terminal hydroxyl group substituted with a tocopherol or cholesterol group, and a polylactic acide derivative wherein one end of the polylactic acid is covalently bound to at least one carboxyl group. The carboxyl group of the polylactic acid derivative may be fixed with a di- or trivalent metal ion, which is obtained by adding the di- or trivalent metal ion to the polymeric composition.
    Type: Application
    Filed: May 6, 2005
    Publication date: October 23, 2008
    Applicant: SAMYANG CORPORATION
    Inventors: Yil-Woong Yi, Sa-Won Lee, Jeong-Il Yu, Dong-Hoon Chang, Min-Hyo Seo, Hye-Won Kang, Jae-Hong Kim
  • Amphiphilic block copolymer and polymeric compostition comprising the same for drug delivery
    Publication number: 20080152616
    Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.
    Type: Application
    Filed: October 10, 2007
    Publication date: June 26, 2008
    Inventors: Min Hyo Seo, Sa-Won Lee, Myung-Han Hyun, Jeong-Il Yu, Dong-Hoon Chang, Hye-Jeong Yoon, Jeong-Kyung Kim
  • Amphiphilic block copolymer and polymeric composition comprising the same for drug delivery
    Publication number: 20050201972
    Abstract: The present invention relates to an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block with a terminal hydroxyl group wherein the terminal hydroxyl group of the hydrophobic bock is substituted with a tocopherol or cholesterol group. It also relates to polymeric compositions capable of forming stable micelles in an aqueous solution, comprising the amphiphilic block copolymer and a polylactic acid derivative wherein one or more ends of the polylactic acid are covalently bound to at least one carboxyl group.
    Type: Application
    Filed: October 7, 2004
    Publication date: September 15, 2005
    Inventors: Min Seo, Bong Kim, In Choi, Myung Shim, Sa-Won Lee, Myung-Han Hyun, Jeong-Il Yu, Dong-Hoon Chang, Hye-Jeong Yoon, Jeong-Kyung Kim
  • Polymeric michelle composition with improved stability
    Publication number: 20040253195
    Abstract: Polymeric compositions capable of forming stable micelles in an aqueous solution, comprising an amphiphilic block copolymer of a hydrophilic block and a hydrophobic block, and a polylactic acid derivative wherein one end of the polylactic acid is covalently bound to at least one carboxyl group. The carboxyl group of the polylactic acid derivative may be fixed with a di- or tri-valent metal ion, obtained by adding the di- or tri-valent metal ion to the polymeric composition.
    Type: Application
    Filed: April 15, 2004
    Publication date: December 16, 2004
    Inventors: Min-Hyo Seo, Sa-Won Lee, Hee-Jo Kim, Jeong-Kyung Kim, Myung-Han Huyn, Jeong-Il Yu