Patents by Inventor Yeon-Suk Choi

Yeon-Suk 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).

  • Patent number: 10983080
    Abstract: Disclosed is an apparatus for quantitively supplying a high-viscosity fluid sample, the apparatus including a cylinder body in which a high-viscosity fluid is to be stored, a cylinder head detachably attached to the cylinder body, a piston configured to slide in a longitudinal direction of the cylinder body, and a cutter disposed below the cylinder head and configured to cut a high-viscosity fluid discharged from the cylinder head.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 20, 2021
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Soo Yeol Jeong
  • Patent number: 10866023
    Abstract: Disclosed is an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same. More specifically, gas to be recycled is collected in an adiabatic manner, cooled to a temperature lower than the dew point thereof, and stored in the liquid state through a phase change, thereby saving energy required for re-cooling the gas. Particularly, the present invention relates to an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same, in which recycling gas is compressed through a natural inducement method using a difference in temperature and pressure while being collected and liquefied, thereby reducing noise, vibration, and size of the collector.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: December 15, 2020
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Seung Young Park, Yeon Suk Choi
  • Publication number: 20190137175
    Abstract: Disclosed is an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same. More specifically, gas to be recycled is collected in an adiabatic manner, cooled to a temperature lower than the dew point thereof, and stored in the liquid state through a phase change, thereby saving energy required for re-cooling the gas. Particularly, the present invention relates to an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same, in which recycling gas is compressed through a natural inducement method using a difference in temperature and pressure while being collected and liquefied, thereby reducing noise, vibration, and size of the collector.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 9, 2019
    Applicant: Korea Basic Science Institute
    Inventors: Seung Young Park, Yeon Suk Choi, Min Su Seo, Myung Su Kim
  • Publication number: 20190120778
    Abstract: Disclosed is an apparatus for quantitively supplying a high-viscosity fluid sample, the apparatus including a cylinder body in which a high-viscosity fluid is to be stored, a cylinder head detachably attached to the cylinder body, a piston configured to slide in a longitudinal direction of the cylinder body, and a cutter disposed below the cylinder head and configured to cut a high-viscosity fluid discharged from the cylinder head.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 25, 2019
    Inventors: Yeon Suk CHOI, Soo Yeol JEONG
  • Patent number: 9707624
    Abstract: Provided is a method of synthesizing silver nanoparticles including: a) a nucleation step of reacting a composition containing a silver precursor, a heterogeneous metal precursor, and an amine-based compound at 30 to 120° C. to form a nucleus; and b) a growth step of reacting the composition containing the nucleus formed therein at 155 to 350° C. to grow the nucleus. According to the present invention, significantly uniform and fine silver nanoparticles may be synthesized with high reproducibility on a large scale.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: July 18, 2017
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Gaehang Lee, Yeon Suk Choi
  • Patent number: 9672303
    Abstract: The present invention provides a system and method of predicting the initial cooling of a superconducting magnet, which can predict the change in initial cooling temperature of a superconducting magnet when the superconducting magnet is cooled using an ultra-low refrigerator. In the system and method, the change in cooling temperature of a superconducting magnet can be accurately predicted by classifying influence factors related to the cooling of a superconducting magnet into a plurality of control volumes and inducing a governing equation with respect to each of the control volumes. Based on this system and method, the reliability of basic data required to design an apparatus for measuring a high magnetic field for forming an ultralow-temperature environment can be greatly improved.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: June 6, 2017
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Dong Lak Kim
  • Patent number: 9567349
    Abstract: Provided is a preparing method of an Ag nano-particle for mass-producing Ag nano-particles, the method including: performing a first reaction of a reaction solution containing an Ag precursor and oleylamine at a set first temperature T1; performing a second reaction of the reaction solution at a second temperature T2 set so as to be higher than the first temperature; and obtaining a reactant from the reaction solution, wherein at least one of the first and second reactions is performed in a state in which the reaction solution is not stirred.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 14, 2017
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Gaehang Lee, Yeon Suk Choi, Doo Ri Bae
  • Patent number: 9533354
    Abstract: A method for preparing hydrophobic gold nanoparticles includes adding 1,2-dichlorobenzene as a solvent to gold precursor and using oleylamine and oleic acid with volume ratio of 7.5:2.5 to 5:5 as surfactants. The size of the prepared gold nanoparticles can be controlled over a broad range and may be utilized in various fields such as bio-imaging, photonic crystallization, sensors, organic catalysts, surface enhanced raman spectrum, electronic devices, etc. Further, a method for colorimetric detection of a strong acid uses hydrophilic nanoparticles that are phase transited from the prepared hydrophobic gold nanoparticles. Up to 5 ppm of low content hydrochloric acid can be detected utilizing phase transited hydrophilic nanoparticles in the colorimetric detection method, and the gold nanoparticles that were used in the detection of strong acid can be reused without loss of activity through neutralization with bases.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: January 3, 2017
    Assignee: Korea Basic Science Institute
    Inventors: Gae Hang Lee, Doo Ri Bae, Yeon Suk Choi
  • Patent number: 9476615
    Abstract: Disclosed herein is an autonomous induction heat exchange method using a pressure difference caused by heat exchange in a single pipeline. In addition, the present invention relates to a gas compressor and a heat pump using the method. The present invention does not require a separate drive device. Therefore, occurrence of vibration or noise can be fundamentally prevented. Consumption of power for compressing gas or heat exchange can be minimized. Furthermore, gas circulates in an autonomous induction manner using a pressure difference. Thus, the length, size and structural shape of a gas compressor or a heat pump can be modified in a variety of ways. Thereby, the present invention can be easily used in different kinds of apparatus and systems and can be easily applied to small heat exchange modules using micro-channels as well as large heat exchange systems.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: October 25, 2016
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Seung Young Park, Yeon Suk Choi
  • Publication number: 20160273830
    Abstract: Disclosed is an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same. More specifically, gas to be recycled is collected in an adiabatic manner, cooled to a temperature lower than the dew point thereof, and stored in the liquid state through a phase change, thereby saving energy required for re-cooling the gas. Particularly, the present invention relates to an adiabatic collector for recycling gas, a liquefier for recycling gas, and a recovery apparatus for recycling gas using the same, in which recycling gas is compressed through a natural inducement method using a difference in temperature and pressure while being collected and liquefied, thereby reducing noise, vibration, and size of the collector.
    Type: Application
    Filed: November 12, 2013
    Publication date: September 22, 2016
    Inventors: Seung Young Park, Yeon Suk Choi, Min Su Seo, Myung Su Kim
  • Patent number: 9448292
    Abstract: Provided is a cryoprobe using a closed gas loop for a nuclear magnetic resonance apparatus, including: superconducting magnets providing a magnetic field; a rotor rotatably disposed between the superconducting magnets in the state of a sample being put therein, the rotor being rotated by a driving gas; a coil configured to generate a nuclear magnetic resonance spectrum according to a resonance phenomenon of the sample by applying a radio frequency to the rotor; and a gas loop configured to cool the driving gas in a cryogenic condition while circulating it in a closed-loop condition and to supply the driving gas to the rotor, wherein the gas loop supplies the driving gas to the rotor while cooling it in a cryogenic condition, thereby rotating the rotor.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: September 20, 2016
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Seung Young Park, Sang Gap Lee
  • Publication number: 20160121401
    Abstract: Provided is a method of synthesizing silver nanoparticles including: a) a nucleation step of reacting a composition containing a silver precursor, a heterogeneous metal precursor, and an amine-based compound at 30 to 120° C. to form a nucleus; and b) a growth step of reacting the composition containing the nucleus formed therein at 155 to 350° C. to grow the nucleus. According to the present invention, significantly uniform and fine silver nanoparticles may be synthesized with high reproducibility on a large scale.
    Type: Application
    Filed: December 8, 2014
    Publication date: May 5, 2016
    Inventors: Gaehang LEE, Yeon Suk CHOI
  • Patent number: 9324538
    Abstract: A coaxial drive apparatus for multidirectional control, including: a housing; a stage pivotally installed in the housing, with the object laid on the stage; a rotary shaft connected to the stage and rotated to cause the stage to pivot; a rotation transmitting unit transmitting a rotating force of the rotary shaft to the stage; a sliding pipe coaxially fitted over the rotary shaft so as to be moved along a lengthwise direction of the rotary shaft or to be rotated on a central axis of the rotary shaft; a moving unit moving the object laid on the stage in the lengthwise direction of the rotary shaft according to a movement of the sliding pipe, and moving the object in a transverse direction of the rotary shaft according to a rotation of the sliding pipe; and a controller providing a driving force to the rotary shaft and to the sliding pipe.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: April 26, 2016
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Myung Su Kim, Min-Gab Bog, Jong-Su Jeon, Jong-Gu Kim
  • Publication number: 20150143940
    Abstract: A coaxial drive apparatus for multidirectional control, including: a housing; a stage pivotally installed in the housing, with the object laid on the stage; a rotary shaft connected to the stage and rotated to cause the stage to pivot; a rotation transmitting unit transmitting a rotating force of the rotary shaft to the stage; a sliding pipe coaxially fitted over the rotary shaft so as to be moved along a lengthwise direction of the rotary shaft or to be rotated on a central axis of the rotary shaft; a moving unit moving the object laid on the stage in the lengthwise direction of the rotary shaft according to a movement of the sliding pipe, and moving the object in a transverse direction of the rotary shaft according to a rotation of the sliding pipe; and a controller providing a driving force to the rotary shaft and to the sliding pipe.
    Type: Application
    Filed: December 16, 2013
    Publication date: May 28, 2015
    Applicant: Korea Basic Science Institute
    Inventors: Yeon Suk Choi, Myung Su Kim, Min-Gab Bog, Jong-Su Jeon, Jong-Gu Kim
  • Publication number: 20150132595
    Abstract: Provided is a preparing method of an Ag nano-particle for mass-producing Ag nano-particles, the method including: performing a first reaction of a reaction solution containing an Ag precursor and oleylamine at a set first temperature T1; performing a second reaction of the reaction solution at a second temperature T2 set so as to be higher than the first temperature; and obtaining a reactant from the reaction solution, wherein at least one of the first and second reactions is performed in a state in which the reaction solution is not stirred.
    Type: Application
    Filed: February 10, 2014
    Publication date: May 14, 2015
    Applicant: Korea Basic Science Institute
    Inventors: Gaehang LEE, Yeon Suk CHOI, Doo Ri BAE
  • Publication number: 20150111751
    Abstract: Provided is a cryoprobe using a closed gas loop for a nuclear magnetic resonance apparatus, including: superconducting magnets providing a magnetic field; a rotor rotatably disposed between the superconducting magnets in the state of a sample being put therein, the rotor being rotated by a driving gas; a coil configured to generate a nuclear magnetic resonance spectrum according to a resonance phenomenon of the sample by applying a radio frequency to the rotor; and a gas loop configured to cool the driving gas in a cryogenic condition while circulating it in a closed-loop condition and to supply the driving gas to the rotor, wherein the gas loop supplies the driving gas to the rotor while cooling it in a cryogenic condition, thereby rotating the rotor.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 23, 2015
    Applicant: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Seung Young Park, Sang Gap Lee
  • Publication number: 20140377876
    Abstract: A method for preparing hydrophobic gold nanoparticles includes adding 1,2-dichlorobenzene as a solvent to gold precursor and using oleylamine and oleic acid with volume ratio of 7.5:2.5 to 5:5 as surfactants. The size of the prepared gold nanoparticles can be controlled over a broad range and may be utilized in various fields such as bio-imaging, photonic crystallization, sensors, organic catalysts, surface enhanced raman spectrum, electronic devices, etc. Further, a method for colorimetric detection of a strong acid uses hydrophilic nanoparticles that are phase transited from the prepared hydrophobic gold nanoparticles. Up to 5 ppm of low content hydrochloric acid can be detected utilizing phase transited hydrophilic nanoparticles in the colorimetric detection method, and the gold nanoparticles that were used in the detection of strong acid can be reused without loss of activity through neutralization with bases.
    Type: Application
    Filed: November 22, 2013
    Publication date: December 25, 2014
    Applicant: Korea Basic Science Institute
    Inventors: Gae Hang LEE, Doo Ri BAE, Yeon Suk CHOI
  • Publication number: 20140180625
    Abstract: The present invention provides a system and method of predicting the initial cooling of a superconducting magnet, which can predict the change in initial cooling temperature of a superconducting magnet when the superconducting magnet is cooled using an ultra-low refrigerator. In the system and method, the change in cooling temperature of a superconducting magnet can be accurately predicted by classifying influence factors related to the cooling of a superconducting magnet into a plurality of control volumes and inducing a governing equation with respect to each of the control volumes. Based on this system and method, the reliability of basic data required to design an apparatus for measuring a high magnetic field for forming an ultralow-temperature environment can be greatly improved.
    Type: Application
    Filed: April 24, 2013
    Publication date: June 26, 2014
    Applicant: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Yeon Suk Choi, Dong Lak Kim
  • Patent number: 8440966
    Abstract: A Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS) is provided. A preamplifier is installed as nearest to an ion cyclotron resonance (ICR) trap as possible at a detector part in the mass spectrometer, and thermal noise generated at the preamplifier is minimized by means of a cryo-cooling system to increase a signal-to-noise ratio of ion detection signals such that an ultra-low amount of specimen can be detected, which was impossible in the related art.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: May 14, 2013
    Assignee: Korea Basic Science Institute
    Inventors: Myoung Choul Choi, Yeon Suk Choi, Jeong Min Lee, Seung Yong Kim, Dong Lak Kim, Hyun Sik Kim, Jong Shin Yoo, Stefan Karl-Heinz Stahl
  • Publication number: 20120137707
    Abstract: An apparatus for transferring cryogenic refrigeration includes a cryocooler interface, a housing, a working fluid, a heat exchanger, a flexible thermal link, and a remote cartridge cold head. The cryocooler interface is thermally connected to a cryocooler providing a source of refrigeration. The refrigeration is passed from the crycooler into the heat exchanger via the cryocooler interface. The remote cartridge cold head is attached to a remote location. Heat is drawn from the remote location through the remote cartridge cold head and into the heat exchanger via the working fluid within the flexible thermal link and housing. Within the heat exchanger, heat is transferred from the working fluid to the refrigeration source, such as a cryocooler; accordingly, the remote location is cooled.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 7, 2012
    Applicants: Korea Basic Science Institute, The Florida State University Research Foundation, Inc.
    Inventors: Thomas Andrew Painter, Yeon Suk Choi, Dong Lak Kim, Hongyu Bai