Patents by Inventor Cheol Hee Ahn

Cheol Hee Ahn 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).

  • Polyester resin and preparation method of the same
    Patent number: 11312821
    Abstract: Provided are a polyester resin having a high residual rate of isosorbide, thereby exhibiting excellent heat resistance, excellent mechanical properties such as tensile strength, Young's modulus, etc., and excellent appearance properties and transparency, and a preparation method thereof.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 26, 2022
    Assignees: SK Chemicals Co., Ltd., Seoul National University R&DB Foundation
    Inventors: Ji-Hyun Kim, Jong Ryang Kim, Cheol Hee Ahn
  • POLYESTER RESIN AND PREPARATION METHOD OF THE SAME
    Publication number: 20210079157
    Abstract: Provided are a polyester resin having a high residual rate of isosorbide, thereby exhibiting excellent heat resistance, excellent mechanical properties such as tensile strength, Young's modulus, etc., and excellent appearance properties and transparency, and a preparation method thereof.
    Type: Application
    Filed: March 5, 2019
    Publication date: March 18, 2021
    Inventors: Ji-Hyun KIM, Jong Ryang KIM, Cheol Hee AHN
  • CT contrast medium for detecting thrombus, comprising fibrin-targeted peptide sequence-conjugated glycol chitosan-gold nanoparticles
    Patent number: 9717807
    Abstract: The present invention relates to a CT contrast agent for detecting a thrombus, comprising fibrin-targeted peptide sequence-conjugated glycol chitosan-gold nanoparticles. The CT contrast agent for detecting a thrombus according to an embodiment of the present invention may allow rapid and repeated acquisition of CT image information related to the size and location of a thrombus in cardio-cerebral vascular thrombosis, and also enables the imaging monitoring of cerebral thrombus.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: August 1, 2017
    Assignees: Dongguk University Industry-Academic Cooperation Foundation, SNU R & DB Foundation, Korea Institute of Science and Technology
    Inventors: Dong Eog Kim, Jeong Yeon Kim, In Cheol Sun, Sung Kyung Park, Cheol Hee Ahn, Kwang Meyung Kim
  • CT Contrast Medium for Detecting Thrombus, Comprising Fibrin-Targeted Peptide Sequence-Conjugated Glycol Chitosan-Gold Nanoparticles
    Publication number: 20150139912
    Abstract: The present invention relates to a CT contrast agent for detecting a thrombus, comprising fibrin-targeted peptide sequence-conjugated glycol chitosan-gold nanoparticles. The CT contrast agent for detecting a thrombus according to an embodiment of the present invention may allow rapid and repeated acquisition of CT image information related to the size and location of a thrombus in cardio-cerebral vascular thrombosis, and also enables the imaging monitoring of cerebral thrombus.
    Type: Application
    Filed: May 13, 2013
    Publication date: May 21, 2015
    Inventors: Dong Eog Kim, Jeong Yeon Kim, In Cheol Sun, Sung Kyung Park, Cheol Hee Ahn, Kwang Meyung Kim
  • Biodegradable cationic copolymers of poly (alkylenimine) and poly (ethylene glycol) for the delivery of bioactive agents
    Patent number: 6652886
    Abstract: A biodegradable, novel cationic coopolymer comprising a a poly(alkylenimine)(PAI), a hydrophilic polymer, and a biodegradable linker, wherein the biodegradable linker covalently links the PAI and the hydrophilic polymer. The biodegradable cationic copolymers in the present invention can be used in drug delivery and are especially useful for delivery of a nucleic acid or any anionic bioactive agent to various organs and tissues after local or systemic administration.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: November 25, 2003
    Assignee: Expression Genetics
    Inventors: Cheol Hee Ahn, Sung Wan Kim
  • Biodegradable cationic copolymers of poly (alkylenimine) and poly (ethylene glycol) for the delivery of bioactive agents
    Publication number: 20020141965
    Abstract: A biodegradable, novel cationic coopolymer comprising a a poly(alkylenimine)(PAI), a hydrophilic polymer, and a biodegradable linker, wherein the biodegradable linker covalently links the PAI and the hydrophilic polymer. The biodegradable cationic copolymers in the present invention can be used in drug delivery and are especially useful for delivery of a nucleic acid or any anionic bioactive agent to various organs and tissues after local or systemic administration.
    Type: Application
    Filed: February 16, 2001
    Publication date: October 3, 2002
    Applicant: EXPRESSION GENETICS, INC.
    Inventors: Cheol Hee Ahn, Sung Wan Kim