Patents by Inventor Hun Ju Lee

Hun Ju Lee 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: 11111557
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention, comprises: Si: 2.0 to 3.5%, Al: 0.05 to 2.0%, Mn: 0.05 to 2.0%, In: 0.0002 to 0.003% by wt % and Fe and inevitable impurities as the remainder.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: September 7, 2021
    Assignee: POSCO
    Inventors: Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Patent number: 11060170
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention may include, by weight, by weight, 2.0 to 3.5% of Si, 0.3 to 2.5% of Al, 0.3 to 2.5% of Mn, individually or in a total amount of 0.0005 to 0.03% of at least one of Ga and Ge, and the remainder including Fe and impurities, and may satisfy the following Formula 1. 0.2?([Si]+[Al]+0.5×[Mn])/(([Ga]+[Ge])×1000)?5.27??[Formula 1] ([Si], [Al], [Mn], [Ga] and [Ge] represent the content (% by weight) of Si, Al, Mn, Ga and Ge, respectively).
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventors: Jae Hoon Kim, Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Patent number: 10941457
    Abstract: A method for manufacturing a non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes performing hot rolling on a slab after heating the slab to manufacture a hot rolled sheet; performing hot rolled sheet annealing on the hot rolled sheet; performing cold rolling on a steel sheet on which the hot rolled sheet annealing is completed to manufacture a cold rolled sheet; and performing cold rolled sheet annealing on the cold rolled sheet in which a difference between a cold rolled sheet annealing temperature in the cold rolled sheet annealing and a hot rolled sheet annealing temperature in the hot rolled sheet annealing is 100° C. or lower.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: March 9, 2021
    Assignee: POSCO
    Inventors: Se Il Lee, Hun Ju Lee
  • Publication number: 20210062281
    Abstract: A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.0 to 4.0% of Si, 0.05 to 1.5% of Al, 0.05 to 2.5% of Mn, equal to or less than 0.005% of C (excluding 0%), equal to or less than 0.005% of N (excluding 0%), 0.001 to 0.1% of Sn, 0.001 to 0.1% of Sb, 0.001 to 0.1% of P, 0.001 to 0.01% of As, 0.0005 to 0.01% of Se, 0.0005 to 0.01% of Pb, 0.0005 to 0.01% of Bi, a remainder of Fe, and inevitable impurities, as wt %, wherein a Taylor factor (M) of each crystal grain included in a steel sheet is expressed in Formula 1, and an average Taylor factor value of the steel sheet is equal to or less than 2.75: M = ? ? CRSS [ Formula ? ? 1 ] (here, ? is a macro stress, and ?CRSS is a critical resolved shear stress.
    Type: Application
    Filed: May 16, 2018
    Publication date: March 4, 2021
    Inventors: Hun Ju Lee, Yong-Soo Kim, Su-Yong Shin
  • Publication number: 20200095659
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention comprises Si: 2.0 to 3.5%, Al: 0.3 to 3.5%, Mn: 0.2 to 4.5%, Zn: 0.0005 to 0.02% in wt % and Fe and inevitable impurities as a balance amount.
    Type: Application
    Filed: December 19, 2017
    Publication date: March 26, 2020
    Inventors: Jae-Hoon Kim, Jong Uk Ryu, Hun Ju Lee, Yoon Sung Kim
  • Publication number: 20200087750
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention, comprises: Si: 2.0 to 3.5%, Al: 0.05 to 2.0%, Mn: 0.05 to 2.0%, In: 0.0002 to 0.003% by wt % and Fe and inevitable impurities as the remainder.
    Type: Application
    Filed: December 19, 2017
    Publication date: March 19, 2020
    Inventors: Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Publication number: 20200080175
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention may include, by weight, by weight, 2.0 to 3.5% of Si, 0.3 to 2.5% of Al, 0.3 to 2.5% of Mn, individually or in a total amount of 0.0005 to 0.03% of at least one of Ga and Ge, and the remainder including Fe and impurities, and may satisfy the following Formula 1. 0.2?([Si]+[Al]+0.5×[Mn])/(([Ga]+[Ge])×1000)?5.27 ??[Formula 1] ([Si], [Al], [Mn], [Ga] and [Ge] represent the content (% by weight) of Si, Al, Mn, Ga and Ge, respectively.
    Type: Application
    Filed: December 19, 2017
    Publication date: March 12, 2020
    Inventors: Jae Hoon Kim, Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Patent number: 10487014
    Abstract: Equipment for manufacturing ceramic wires is disclosed. The manufacturing equipment can comprise a deposition unit for depositing the ceramic wire on a wire substrate, a loading/unloading unit having a release reel for providing the wire substrate to the deposition unit and a coiling reel for discharging the wire substrate from the deposition unit, and at least one buffer unit arranged between the loading/unloading unit and the deposition unit. The buffer unit may continuously be providing the wire substrate to the deposition unit or continuously winding the wire substrate from the deposition unit when the release reel or the coiling reel is replaced.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: November 26, 2019
    Assignee: Sunam Co., Ltd.
    Inventors: KyuHan Choi, Seung Hyun Moon, Soon Chul Hwang, Hun-Ju Lee
  • Patent number: 10262776
    Abstract: The present invention relates to a superconductor and a method of manufacturing the same. The superconductor comprises: a substrate having a tape shape that extends in a first direction and having surfaces which are defined as a top surface, a bottom surface, and both side surfaces; a superconductive layer positioned on the top surface of the substrate; a first stabilizing layer disposed on the superconductive layer and containing a first metal; a protective layer disposed on the first stabilizing layer and containing a second metal which is different from the first metal; and an first alloy layer disposed between the stabilizing layer and the protective layer and containing the first and second metals.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 16, 2019
    Assignee: Sunam Co., Ltd.
    Inventors: Kyu Han Choi, Seung Hyun Moon, Soon Chul Hwang, Hun Ju Lee, Cheol Yeong Jang, Woong Kwon
  • Publication number: 20190017135
    Abstract: A non-directional electrical steel sheet according to an embodiment of the present disclosure includes, in wt %, 2.5 to 3.3 wt % of Si, 0.05 to 1 wt % of Al, 0.05 to 1 wt % of Mn, 0.01 wt % or less of (not including 0 wt %) S, 0.005 wt % or less of (not including 0 wt %) N, 0.005 wt % or less of (not including 0 wt %) C, 0.005 wt % or less of (not including 0 wt %) Ti, 0.005 wt % or less of (not including 0 wt %) 0.001 to 0.1 wt % of P, 0.001 to 0.1 wt % of Sn, and 0.001 to 0.1 wt % of Sb, with the remainder being Fe and unavoidable impurities, and satisfies Formulas 1 to 3 below. 1.7?[Si]([Al]+[Mn])?2.9 ??[Formula 1] 50?13.25+11.3*([Si]+[Al][Mn]/2)?60 ??[Formula 2] 0.025?[P]+[Sn]+[Sb]?0.15 ??[Formula 3] (In Formulas 1 to 3, [Si], [Al], [Mn], [P], [Sn], and [Sb] represent the content (in wt %) of Si, Al, Mn, P, Sn, and Sb, respectively).
    Type: Application
    Filed: December 23, 2016
    Publication date: January 17, 2019
    Inventors: Hun Ju LEE, Yong Soo KIM, Su Yong SHIN
  • Publication number: 20180355450
    Abstract: A non-oriented electric steel sheet according to an embodiment of the present disclosure includes 2.5 wt % to 3.1 wt % of Si, 0.1 wt % to 1.3 wt % of Al, 0.2 wt % to 1.5 wt % of Mn, 0.008 wt % or less of C (excluding 0 wt %), 0.005 wt % or less of S (excluding 0 wt %), 0.005 wt % or less of N (excluding 0 wt %), 0.005 wt % or less of Ti (excluding 0 wt %), 0.001 wt % to 0.07 wt % of Mo, 0.001 wt % to 0.07 wt % of P, 0.001 wt % to 0.07 wt % of Sn, and 0.001 wt % to 0.07 wt % of Sb, in which a remainder includes Fe and inevitable impurities, an average crystal grain diameter is 70 ?m to 150 ?m, the non-oriented electric steel sheet satisfies Equations (1) and (2), 0.32?([Al]+[Mn])/[Si]?0.5?? [Equation 1] 0.025?[Mo]+[P]+[Sn]+[Sb]?0.15?? [Equation 2] (here, [Si], [Al], [Mn], [Mo], [P], [Sn], and [Sb] denote the contents (wt %) of Si, Al, Mn, Mo, P, Sn, and Sb).
    Type: Application
    Filed: December 9, 2016
    Publication date: December 13, 2018
    Applicant: POSCO
    Inventors: Hun Ju LEE, Yong Soo KIM, Su Yong SIN
  • Publication number: 20170362676
    Abstract: A method for manufacturing a non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes performing hot rolling on a slab after heating the slab to manufacture a hot rolled sheet; performing hot rolled sheet annealing on the hot rolled sheet; performing cold rolling on a steel sheet on which the hot rolled sheet annealing is completed to manufacture a cold rolled sheet; and performing cold rolled sheet annealing on the cold rolled sheet in which a difference between a cold rolled sheet annealing temperature in the cold rolled sheet annealing and a hot rolled sheet annealing temperature in the hot rolled sheet annealing is 100° C. or lower.
    Type: Application
    Filed: December 21, 2015
    Publication date: December 21, 2017
    Inventors: Se Il LEE, Hun Ju LEE
  • Patent number: 9634223
    Abstract: A super conductor is formed by a process including a first step of forming liquid-phase rare earth-copper-barium oxide by heat treating a superconductor precursor including a rare earth element, barium, and copper, a second step of forming a first superconductor of the rare earth-copper-barium oxide that is epitaxially grown from the liquid-phase rare earth-copper-barium oxide, and a third step of forming a second superconductor of the rare earth-copper-barium oxide by heat treating the first superconductor, wherein the heat treatment of the third step is performed in an atmosphere in which the rare earth-copper-barium oxide has no liquid phase.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: April 25, 2017
    Assignees: SUNAM CO., LTD., SNU R&DB FOUNDATION
    Inventors: Sang Im Yoo, Jung Woo Lee, Soon Mi Choi, Seung Hyun Moon, Hun-Ju Lee, Jae Hun Lee
  • Publication number: 20160289125
    Abstract: Equipment for manufacturing ceramic wires is disclosed. The manufacturing equipment can comprise a deposition unit for depositing the ceramic wire on a wire substrate, a loading/unloading unit having a release reel for providing the wire substrate to the deposition unit and a coiling reel for discharging the wire substrate from the deposition unit, and at least one buffer unit arranged between the loading/unloading unit and the deposition unit. The buffer unit may continuously be providing the wire substrate to the deposition unit or continuously winding the wire substrate from the deposition unit when the release reel or the coiling reel is replaced.
    Type: Application
    Filed: September 3, 2014
    Publication date: October 6, 2016
    Inventors: KyuHan CHOI, Seung Hyun MOON, Soon Chul HWANG, Hun-Ju LEE
  • Publication number: 20160247608
    Abstract: The present invention relates to a superconductor and a method of manufacturing the same. The superconductor comprises: a substrate having a tape shape that extends in a first direction and having surfaces which are defined as a top surface, a bottom surface, and both side surfaces; a superconductive layer positioned on the top surface of the substrate; a first stabilizing layer disposed on the superconductive layer and containing a first metal; a protective layer disposed on the first stabilizing layer and containing a second metal which is different from the first metal; and an first alloy layer disposed between the stabilizing layer and the protective layer and containing the first and second metals.
    Type: Application
    Filed: August 28, 2014
    Publication date: August 25, 2016
    Inventors: Kyu Han CHOI, Seung Hyun MOON, Soon Chul HWANG, Hun Ju LEE, Cheol Yeong JANG, Woong KWON
  • Patent number: 9362477
    Abstract: Provided is a method of forming a ceramic wire. In the method, a ceramic precursor film is deposited on a wire substrate. Then, the wire substrate on which the ceramic precursor film is deposited is treated by heating. For treating the wire substrate by heating, a temperature of the wire substrate and/or an oxygen partial pressure of the wire substrate are controlled such that the ceramic precursor film is in a liquid state and an epitaxy ceramic film is formed from the liquid ceramic precursor film on the wire substrate.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: June 7, 2016
    Assignee: SUNAM CO., LTD.
    Inventors: Seung-Hyun Moon, Hun-Ju Lee, Sang-Im Yoo, Hong-Soo Ha
  • Publication number: 20160012944
    Abstract: A super conductor is formed by a process including a first step of forming liquid-phase rare earth-copper-barium oxide by heat treating a superconductor precursor including a rare earth element, barium, and copper, a second step of forming a first superconductor of the rare earth-copper-barium oxide that is epitaxially grown from the liquid-phase rare earth-copper-barium oxide, and a third step of forming a second superconductor of the rare earth-copper-barium oxide by heat treating the first superconductor, wherein the heat treatment of the third step is performed in an atmosphere in which the rare earth-copper-barium oxide has no liquid phase.
    Type: Application
    Filed: April 24, 2015
    Publication date: January 14, 2016
    Inventors: Sang Im YOO, Jung Woo LEE, Soon Mi CHOI, Seung Hyun MOON, Hun-Ju LEE, Jae Hun LEE
  • Publication number: 20150228379
    Abstract: Provided is a method of forming a superconducting body. The method includes providing amorphous rare-earth-copper-barium oxide and performing a heat treatment on the amorphous rare-earth-copper-barium oxide to form a superconductor containing distributed rare-earth oxide grains.
    Type: Application
    Filed: October 8, 2012
    Publication date: August 13, 2015
    Inventors: Sang-Im Yoo, Jung-Woo Lee, Soon Mi Choi, Seung Hyun Moon, Hun Ju Lee, Jae Hun Lee
  • Publication number: 20140342916
    Abstract: Provided is a method of forming a superconducting wire. In the method, a buffer layer is formed on a substrate. Then, a superconducting precursor film is formed on the substrate formed with the pinning seed layer. Thereafter, the substrate formed with the superconducting precursor film is heat-treated to form a superconducting film including magnetic flux pinning centers on the substrate. The magnetic flux pinning centers comprise at least one element included in the pinning seed layer, and at least one element included in the superconducting precursor film.
    Type: Application
    Filed: January 17, 2013
    Publication date: November 20, 2014
    Inventors: Seung Hyun Moon, Jae Hoon Lee, Hun-Ju Lee
  • Publication number: 20120329658
    Abstract: Provided is a method of forming a ceramic wire. In the method, a ceramic precursor film is deposited on a wire substrate. Then, the wire substrate on which the ceramic precursor film is deposited is treated by heating. For treating the wire substrate by heating, a temperature of the wire substrate and/or an oxygen partial pressure of the wire substrate are controlled such that the ceramic precursor film is in a liquid state and an epitaxy ceramic film is formed from the liquid ceramic precursor film on the wire substrate.
    Type: Application
    Filed: August 3, 2010
    Publication date: December 27, 2012
    Inventors: Seung-Hyun Moon, Hun-Ju Lee, Sang-Im Yoo, Hong-Soo Ha