Patents by Inventor Dong Kyu Choi

Dong Kyu 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: 10870647
    Abstract: The present invention relates to a novel imidazopyridine derivative, a method for preparing the same, and a pharmaceutical composition containing the same as an active ingredient for preventing or treating cancer. The novel imidazopyridine derivative according to the present invention, a stereoisomer thereof and a pharmaceutically acceptable salt thereof can effectively inhibit cancer-related kinases, are excellent in inhibiting proliferation of cancer cells in a cancer cell line, and effectively inhibit proliferation of cancer cells (cancer cell apoptosis) in a cancer cell heterograft model, and thus can be useful as a pharmaceutical composition containing the same as an active ingredient for preventing or treating cancer.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: December 22, 2020
    Assignee: DAEGU-GYEONGBUK MEDICAL INNOVATION FOUNDATION
    Inventors: Hwan Geun Choi, Jung Beom Son, Shinae Kim, Seungyeon Lee, Eunhwa Ko, Joongheui Cho, Seock Yong Kang, So Young Kim, Jin-Hee Park, Yi Kyung Ko, Hee Yoon Ryu, Nam Doo Kim, Hyunkyoung Kim, Younho Lee, Sun-Hwa Lee, Dayea Kim, Sun Joo Lee, Seongho Hong, Sang Hyun Min, Sungwoo Lee, Dong Kyu Choi, Jae Hyun Bae, Eunmi Hong, Tae-Ho Jang, Jaeyoung Song, Sangbum Kim, Suk Kyoon Yoon
  • Patent number: 10860958
    Abstract: A work object processing apparatus includes a memory unit configured to include a user memory region associated with user information, a message thread memory region accessible through the user information and associated with a message thread, and a work object memory region accessible through the message thread and associated with a work object, a message thread processing unit configured to receive a work object, including a work producer, a work processor, and work contents, through a chat room associated with a message thread and to process work object operation on the message thread, and a work object processing unit configured to process a work object state of the work object changed in a work processing diagram depending on a work interaction between the work producer and the work processor.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 8, 2020
    Assignees: DELTA PDS CO., LTD
    Inventors: Hyun Kyu Choi, Dong Kyu Choi, Jae Ho Choi
  • Publication number: 20200239109
    Abstract: A BOG reliquefaction system includes: a compressor; a heat exchanger cooling the BOG compressed by the compressor through heat exchange using BOG not compressed by the compressor; a pressure reducer disposed downstream of the heat exchanger and reducing a pressure of fluid cooled by the heat exchanger; and a combination of a first temperature sensor disposed upstream of a cold fluid channel of the heat exchanger and a fourth temperature sensor disposed downstream of a hot fluid channel of the heat exchanger, combination of a second temperature sensor disposed downstream of the cold fluid channel of the heat exchanger and a third temperature sensor disposed upstream of the hot fluid channel of the heat exchanger, or combination of a first pressure sensor disposed upstream of the hot fluid channel of the heat exchanger and a second pressure sensor disposed downstream of the hot fluid channel of the heat exchanger.
    Type: Application
    Filed: August 3, 2017
    Publication date: July 30, 2020
    Inventors: Joon Chae LEE, Dong Kyu CHOI, Hyun Jun SHIN
  • Patent number: 10661873
    Abstract: A ship includes: a boil-off gas heat exchanger installed on a downstream of a storage tank and heat-exchanges a compressed boil-off gas (“a first fluid”) by a boil-off gas discharged from the storage tank as a refrigerant, to cool the boil-off gas; a compressor installed on a downstream of the boil-off gas heat exchanger and compresses a part of the boil-off gas discharged from the storage tank; an extra compressor installed on a downstream of the boil-off gas heat exchanger and in parallel with the compressor and compresses the other part of the boil-off gas discharged from the storage tank; a refrigerant heat exchanger which additionally cools the first fluid which is cooled by the boil-off gas heat exchanger; and a refrigerant decompressing device which expands a second fluid, which is sent to the refrigerant heat exchanger, and then sends the second fluid back to the refrigerant heat exchanger.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 26, 2020
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Hyun Jun Shin, Dong Kyu Choi, Young Sik Moon, Su Kyung An, Hyun Min Jang, Jae Wook Son, Joon Chae Lee
  • Patent number: 10661874
    Abstract: A ship includes: a boil-off gas heat exchanger which is installed on a downstream of a storage tank and heat-exchanges a compressed boil-off gas (“a first fluid”) by a boil-off gas discharged from the storage tank as a refrigerant to cool the boil-off gas; a compressor installed on a downstream of the boil-off gas heat exchanger and compresses a part of the boil-off gas from the storage tank; an extra compressor which is installed on a downstream of the boil-off gas heat exchanger and in parallel with the compressor and compresses the other part of the boil-off gas from the storage tank; a refrigerant heat exchanger which additionally cools the first fluid; and a refrigerant decompressing device which expands a second fluid, which is sent to the refrigerant heat exchanger, and then sends the second fluid back to the refrigerant heat exchanger.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 26, 2020
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Hyun Jun Shin, Dong Kyu Choi, Young Sik Moon, Su Kyung An, Hyun Min Jang, Jae Wook Son, Joon Chae Lee
  • Publication number: 20200156741
    Abstract: Disclosed is a boil-off gas reliquefaction system for vessels. The BOG reliquefaction system for vessels includes: a multistage compressor compressing BOG; a heat exchanger cooling the BOG compressed by the multistage compressor through heat exchange using BOG not compressed by the multistage compressor as a refrigerant; a pressure reducer disposed downstream of the heat exchanger and decompressing a fluid cooled by the heat exchanger; and a bypass line through which BOG is supplied to the multistage compressor after bypassing the heat exchanger.
    Type: Application
    Filed: August 3, 2017
    Publication date: May 21, 2020
    Inventors: Joon Chae LEE, Dong Kyu CHOI
  • Patent number: 10654553
    Abstract: A ship including a liquefied gas storage tank includes: first and second compressors which compresse a boil-off gas discharged from a storage tank; a boost compressor which compresses one part of the boil-off gas that is compressed by at least any one of the first compressor and/or the second compressor; a first heat exchanger which heat exchanges the boil-off gas compressed by the boost compressor and the boil-off gas discharged from the storage tank; a refrigerant decompressing device which expands the other part of the boil-off gas that is compressed by at least any one of the first compressor and/or the second compressor; a second heat exchanger which cools, by a fluid expanded by the refrigerant decompressing device as a refrigerant; and an additional compressor which is compresses the refrigerant that passes through the refrigerant decompressing device and second heat exchanger.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: May 19, 2020
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Hyun Jun Shin, Dong Kyu Choi, Young Sik Moon
  • Publication number: 20200079485
    Abstract: A system for reliquefying a boil off gas generated in a storage tank includes a first compressor compressing a partial amount (hereinafter, referred to as ‘fluid a’) of boil off gas discharged from the storage tank, a second compressor compressing another partial amount (hereinafter, referred to as ‘fluid b’) of boil off gas discharged from the storage tank, a second expanding unit expanding a partial amount (hereinafter, referred to as ‘fluid c’) of a flow formed as the fluid a and the fluid b join, a heat-exchanger cooling another partial amount (hereinafter, referred to as ‘fluid d’) of the flow formed as the fluid a and the fluid b join, and a first expanding unit expanding the fluid d cooled by the heat-exchanger, wherein the heat-exchanger heat-exchanges the fluid d with the fluid c as a coolant expanded by the second expanding unit to cool the fluid d.
    Type: Application
    Filed: November 12, 2019
    Publication date: March 12, 2020
    Inventors: Hyun Jun Shin, Dong Kyu CHOI, Young Sik MOON, Su Kyung AN, Joon Chae LEE
  • Publication number: 20200049311
    Abstract: Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar.
    Type: Application
    Filed: October 21, 2019
    Publication date: February 13, 2020
    Inventors: Jung Han LEE, Jung Ho CHOI, Sung Kon HAN, Dong Kyu CHOI, Young Sik MOON
  • Patent number: 10518859
    Abstract: In a BOG treatment system, boil-off gas (BOG) discharged from a storage tank is compressed, most of the BOG is used as the fuel of vessel engines, and a remaining part of the BOG is liquefied by cold energy of BOG newly discharged from the storage tank and is returned to the storage tank, thereby efficiently utilizing the BOG. The BOG treatment system for a vessel includes a compressor compressing the BOG discharged from the storage tank; a medium pressure gas engine receiving at least a part of the BOG compressed by the compressor, as fuel; a heat exchanger exchanging heat between the remaining part of the BOG, which is not supplied to the medium pressure gas engine as fuel, and the BOG, which is discharged from the storage tank and is not compressed; and an expander decompressing the remaining part of the BOG cooled by the heat exchanger.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: December 31, 2019
    Assignee: Daewoo Shipbuilding & Marine Engineering Co., Ltd.
    Inventors: Joon Chae Lee, Dong Kyu Choi, Young Sik Moon, Seung Kyo Jung, Je Heon Jung
  • Patent number: 10508769
    Abstract: Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: December 17, 2019
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Jung Han Lee, Jung Ho Choi, Sung Kon Han, Dong Kyu Choi, Young Sik Moon
  • Publication number: 20190351988
    Abstract: Disclosed herein is a BOG reliquefaction method for LNG ships. The BOG reliquefaction method for LNG ships includes: 1) compressing BOG; 2) cooling the BOG compressed in Step 1) through heat exchange between the compressed BOG and a refrigerant using a heat exchanger; 3) expanding the BOG cooled in Step 2); and 4) stably maintaining reliquefaction performance regardless of change in flow rate of the BOG compressed in Step 1) and supplied to the heat exchanger to be used as a reliquefaction target.
    Type: Application
    Filed: January 24, 2018
    Publication date: November 21, 2019
    Inventors: Hae Won JUNG, Dong Eok KANG, Joon Chae LEE, Dong Kyu CHOI
  • Publication number: 20190315738
    Abstract: The present invention relates to a novel imidazopyridine derivative, a method for preparing the same, and a pharmaceutical composition containing the same as an active ingredient for preventing or treating cancer. The novel imidazopyridine derivative according to the present invention, a stereoisomer thereof and a pharmaceutically acceptable salt thereof can effectively inhibit cancer-related kinases, are excellent in inhibiting proliferation of cancer cells in a cancer cell line, and effectively inhibit proliferation of cancer cells (cancer cell apoptosis) in a cancer cell heterograft model, and thus can be useful as a pharmaceutical composition containing the same as an active ingredient for preventing or treating cancer.
    Type: Application
    Filed: June 20, 2017
    Publication date: October 17, 2019
    Applicant: DAEGU-GYEONGBUK MEDICAL INNOVATION FOUNDATION
    Inventors: Hwan Geun Choi, Jung Beom Son, Shinae Kim, Seungyeon Lee, Eunhwa Ko, Joongheui Cho, Seock Yong Kang, So Young Kim, Jin-Hee Park, Yi Kyung Ko, Hee Yoon Ryu, Nam Doo Kim, Hyunkyoung Kim, Younho Lee, Sun-Hwa Lee, Dayea Kim, Sun Joo Lee, Seongho Hong, Sang Hyun Min, Sungwoo Lee, Dong Kyu Choi, Jae Hyun Bae, Eunmi Hong, Tae-ho Jang, Jaeyoung Song, Sangbum Kim, Suk Kyoon Yoon
  • Publication number: 20190293236
    Abstract: Disclosed is a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar.
    Type: Application
    Filed: June 12, 2019
    Publication date: September 26, 2019
    Inventors: Jung Han LEE, Jung Ho CHOI, Sung Kon HAN, Dong Kyu CHOI, Young Sik MOON
  • Patent number: 10399655
    Abstract: A ship includes: a boil-off gas heat exchanger which heat-exchanges a compressed boil-off gas (“a first fluid”) by means of a boil-off gas discharged from the storage tank as a refrigerant; a compressor installed on the downstream of the boil-off gas heat exchanger and compressing a part of the boil-off gas discharged from the storage tank; first and second extra compressors provided in parallel with the compressor on the downstream of the boil-off gas heat exchanger and compressing the other part of the boil-off gas discharged from the storage tank; a refrigerant heat exchanger which additionally cools the first fluid cooled by means of the boil-off gas heat exchanger; a refrigerant decompressing device which expands a second fluid, which has been sent to the refrigerant heat exchanger and cooled by means of the refrigerant heat exchanger, and then sending the expanded second fluid back to the refrigerant heat exchanger.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: September 3, 2019
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Hyun Jun Shin, Dong Kyu Choi, Young Sik Moon, Su Kyung An, Hyun Min Jang, Jae Wook Son, Joon Chae Lee
  • Publication number: 20190248450
    Abstract: An apparatus for reliquefaction of boil-off gas for a vessel, comprises: a compression unit for compressing the boil-off gas discharged from the storage tank; and a heat exchanger for heat-exchanging the compressed boil-off gas compressed by the compression unit with the boil-off gas discharged from the storage tank; a first expansion means for dividing the boil-off gas passing through the heat exchanger into at least two flows including a first flow and a second flow, and expanding the divided first flow; a first intercooler for cooling the second flow remaining after the division of the first flow by using the first flow expanded by the expansion means as a refrigerant; and a receiver for receiving a second flow having passed through the first intercooler, in which a downstream pressure of the compression unit is controlled by a flow discharged from the receiver.
    Type: Application
    Filed: October 17, 2016
    Publication date: August 15, 2019
    Inventors: Seung Chul LEE, Seon Jin KIM, Dong Kyu CHOI
  • Patent number: 10374295
    Abstract: An electronic device that utilizes a display as an antenna is provided. The electronic device may include a display including a conductive layer, a signal power supply part electrically coupled to the conductive layer in order to utilize the conductive layer as an antenna radiator, and a substrate electrically connected to the signal power supply part so as to receive a signal of an antenna radiator of the conductive layer through the signal power supply part.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: August 6, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon-Geon Kim, Seung-Tae Ko, Sang-Ho Lim, Dong-Kyu Choi, Won-Bin Hong
  • Patent number: 10364013
    Abstract: A ship including a storage tank for storing a liquefied gas includes: a boil-off gas (BOG) heat exchanger installed on a downstream of a storage tank and heat-exchanges a compressed BOG (“a first fluid”) by a BOG discharged from the storage tank as a refrigerant, to cool the BOG; a compressor installed on a downstream of the BOG heat exchanger and compresses a part of the BOG discharged from the storage tank; an extra compressor installed on a downstream of the BOG heat exchanger and in parallel with the compressor and compresses the other part of the BOG discharged from the storage tank; a refrigerant heat exchanger which additionally cools the first fluid cooled by the BOG heat exchanger; and a refrigerant decompressing device which expands a second fluid sent to the refrigerant heat exchanger, and then sends the second fluid back to the refrigerant heat exchanger.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: July 30, 2019
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Hyun Jun Shin, Dong Kyu Choi, Young Sik Moon, Su Kyung An, Hyun Min Jang, Jae Wook Son, Joon Chae Lee
  • Patent number: 10352499
    Abstract: This application relates to a liquefied natural gas storage apparatus. The apparatus includes a heat insulated tank and liquefied natural gas contained in the tank. The tank has heat insulation sufficient to maintain liquefied natural gas therein such that most of the liquefied natural gas stays in liquid. The contained liquefied natural gas has a vapor pressure from about 0.3 bar to about 2 bar. The apparatus further includes a safety valve configured to release a part of liquefied natural gas contained in the tank when a vapor pressure of liquefied natural gas within the tank becomes higher than a cut-off pressure. The cut-off pressure is from about 0.3 bar to about 2 bar.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: July 16, 2019
    Assignee: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.
    Inventors: Jung Han Lee, Jung Ho Choi, Sung Kon Han, Dong Kyu Choi, Young Sik Moon
  • Patent number: 10116059
    Abstract: According to an embodiment of the present invention, a reradiation repeater may comprise a dielectric substrate, a ground conductor provided on a surface of the dielectric substrate, and a plurality of unit cells provided on another surface of the dielectric substrate, wherein the unit cells reradiate radio waves in the same direction by directing the radio waves which are incident onto the unit cells at different angles to a same direction. The reradiation repeater may facilitate to select, e.g., an installation location and secure a good reradiation capability even when the installation environment is changed (e.g., a variation in the installation location of base station facility), contributing to coverage of a shadow zone. The reradiation repeater may be implemented in various manners according to embodiments of the present invention.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: October 30, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hyun-Jin Kim, Byung-Chul Kim, Young-Ju Lee, Dong-Kyu Choi