Patents by Inventor Ju-Jin Choi

Ju-Jin 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).

  • Publication number: 20250020399
    Abstract: A blow-down method is applied to a reliquefaction system in which boil-off is compressed by a compressor, cooled and reliquefied through a heat exchanger, and returned to the tank after passing through a gas-liquid separator. The reliquefaction system includes a pressure compensation line extending from a downstream side of the compressor to an upside of the gas-liquid separator without passing through the heat exchanger; and a nitrogen blanket line along which nitrogen is supplied to the pressure compensation line. In the event of a trip of the reliquefaction system, nitrogen is supplied to the pressure compensation line along the nitrogen blanket line and is delivered to the downstream side of the compressor to pass through the heat exchanger along the reliquefaction line such that the heat exchanger and the reliquefaction line are blown down to remove compressed gas and reliquefied gas therefrom while being subjected to nitrogen (N2) purging.
    Type: Application
    Filed: December 27, 2021
    Publication date: January 16, 2025
    Inventors: Ju Woon PARK, Seon Jin KIM, Won Jae CHOI
  • Patent number: 8556360
    Abstract: A textile printing method applying inkjet printer comprises the steps for feeding a fabric by a fabric feed roller, applying a pretreatment liquid to the fabric by jetting the pretreatment liquid installed in a pretreatment liquid reservoir installed respective containers filled with individual compositions of a pretreatment liquid, so that such individual compositions are concurrently mixed and applied on the fabric surface to pretreat the fabric by operation of a control unit depending upon the fabric material through a pretreatment head, drying the pretreatment liquid applied to the fabric through a drier, and printing on the dried fabric by jetting the ink installed in a ink reservoir through the printing head. The pretreatment head, the drier and the printing head are serially arranged so that the steps for applying a pretreatment liquid, drying the pretreatment liquid and printing on the dried fabric are concurrently performed.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: October 15, 2013
    Assignee: Intec Co., Ltd.
    Inventors: Kwang-Choon Chung, Myoung-Seon Gong, Hoo-Shick Kim, Ju-Jin Choi, Eun-Jin Park, Hyoung-Seok Kim, Kyong-Min Lee
  • Patent number: 8211453
    Abstract: The present invention relates to antibacterial composition containing silver complexes, antibacterial treatment methods using the same and antibacterial formed article, in which the antibacterial composition containing silver complexes is economical, not wearing off due to washing, cleaning, rubbing, etc., firmly combined to improve durability and antibacterial effect, and applicable to various products due to great solubility and stability.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: July 3, 2012
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Eun-Jin Park, Young-Kwan Seo, Ju-Jin Choi, Dong-Lib Kim, Hyoung-Seok Kim
  • Publication number: 20090324739
    Abstract: The present invention relates to antibacterial composition containing silver complexes, antibacterial treatment methods using the same and antibacterial formed article, in which the antibacterial composition containing silver complexes is economical, not wearing off due to washing, cleaning, rubbing, etc., firmly combined to improve durability and antibacterial effect, and applicable to various products due to great solubility and stability.
    Type: Application
    Filed: March 14, 2007
    Publication date: December 31, 2009
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Eun-Jin Park, Young-Kwan Seo, Ju-Jin Choi, Dong-Lib Kim, Hyoung-Seok Kim
  • Publication number: 20090293209
    Abstract: A textile printing method applying inkjet printer comprises the steps for feeding a fabric by a fabric feed roller, applying a pretreatment liquid to the fabric by jetting the pretreatment liquid installed in a pretreatment liquid reservoir installed respective containers filled with individual compositions of a pretreatment liquid, so that such individual compositions are concurrently mixed and applied on the fabric surface to pretreat the fabric by operation of a control unit depending upon the fabric material through a pretreatment head, drying the pretreatment liquid applied to the fabric through a drier, and printing on the dried fabric by jetting the ink installed in a ink reservoir through the printing head. The pretreatment head, the drier and the printing head are serially arranged so that the steps for applying a pretreatment liquid, drying the pretreatment liquid and printing on the dried fabric are concurrently performed.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 3, 2009
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon CHUNG, Myoung-Seon GONG, Hoo-Shick KIM, Ju-Jin CHOI, Eun-Jin PARK, Hyoung-Seok KIM, Kyong-Min LEE
  • Publication number: 20070040879
    Abstract: The present invention is to provide a method and an apparatus for overcoming complication of the pretreating process due to diversification of materials by digitalizing a method for pretreating a fabric in an inkjet printing process by using an inkjet device, and further, an inkjet printing method and an inkjet printing apparatus for enabling the inkjet printing work to be continuously conducted on the basis of the said pretreatment. The present invention comprises a pretreatment liquid reservoir for enabling the pretreatment mixed liquid to be applied or respective containers to be filled with individual component compositions of a pretreatment liquid, a control unit for controlling application of the pretreatment liquid and a pretreatment head for applying the pretreatment liquid to the fabric, and it may additionally comprise a dryer for drying the pretreated fabric and a printing head for performing the actual printing work.
    Type: Application
    Filed: March 24, 2004
    Publication date: February 22, 2007
    Inventors: Kwang-Choon Chung, Myoung-Seon Gong, Hoo-Shick Kim, Ju-Jin Choi, Eun-Jin Park, Hyoung-Seok Kim, Kyong-Min Lee
  • Patent number: D422632
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: April 11, 2000
    Assignee: Inktec Co., Inc.
    Inventors: Kwang Choon Chung, Young Ho Chung, Chang Soo Yu, Nam Bu Cho, Ju Yeon Lee, Ju Jin Choi