Patents by Inventor Seung Dueg Choi

Seung Dueg 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).

  • Method for manufacturing amorphous alloy by using liquid pig iron
    Patent number: 9963768
    Abstract: A method for manufacturing an amorphous alloy by using liquid pig iron is described. An exemplary embodiment provides a method for manufacturing an amorphous alloy, including providing liquid pig iron, adding an alloy material to the liquid pig iron, and solidifying the liquid pig iron.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: May 8, 2018
    Assignee: POSCO
    Inventors: Sang-Ho Yi, Seung Dueg Choi, Seong Hoon Yi
  • High-carbon iron-based amorphous alloy using molten pig iron and method of manufacturing the same
    Patent number: 9752205
    Abstract: Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe?C?Si?BxPyCrz, wherein ?, ?, ?, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein ? is expressed by ?=100?(?+?+x+y+z) atomic %, ? is expressed by 13.5 atomic %???17.8 atomic %, ? is expressed by 0.30 atomic %???1.50 atomic %, x is expressed by 0.1 atomic %?x?4.0 atomic %, y is expressed by 0.8 atomic %?y?7.7 atomic %, and z is expressed by 0.1 atomic %?z?3.0 atomic %.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: September 5, 2017
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Sang-Won Kim, Sang-Hoon Yoon, Seong Hoon Yi, Young-Geun Son, Eon-Byeong Park, Oh Joon Kwon, Sang-Wook Ha, Seung-Dueg Choi, Gab-Sik Byun
  • High-Carbon Iron-Based Amorphous Alloy Using Molten Pig Iron and Method of Manufacturing the Same
    Publication number: 20160068923
    Abstract: Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe?C?Si?BxPyCrz, wherein ?, ?, ?, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein ? is expressed by ?=100?(?+?+x+y+z) atomic %, ? is expressed by 13.5 atomic %???17.8 atomic %, ? is expressed by 0.30 atomic %???1.50 atomic %, x is expressed by 0.1 atomic %?x?4.0 atomic %, y is expressed by 0.8 atomic %?y?7.7 atomic %, and z is expressed by 0.1 atomic %?z?3.0 atomic %.
    Type: Application
    Filed: November 17, 2015
    Publication date: March 10, 2016
    Inventors: Sang-Won Kim, Sang-Hoon Yoon, Seong Hoon Yi, Young-Geun Son, Eon-Byeong Park, Oh Joon Kwon, Sang-Wook Ha, Seung-Dueg Choi, Gab-Sik Byun
  • High-carbon iron-based amorphous alloy using molten pig iron and method of manufacturing the same
    Patent number: 9222157
    Abstract: Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe?C?Si?BxPyCrz, wherein ?, ?, ?, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein ? is expressed by ?=100?(?+?+x+y+z) atomic %, ? is expressed by 13.5 atomic %???17.8 atomic %, ? is expressed by 0.30 atomic %???1.50 atomic %, x is expressed by 0.1 atomic %?x?4.0 atomic %, y is expressed by 0.8 atomic %?y?7.7 atomic %, and z is expressed by 0.1 atomic %?z?3.0 atomic %.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: December 29, 2015
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Sang-Won Kim, Gab-Sik Byun, Young-Geun Son, Eon-Byeong Park, Sang-Hoon Yoon, Sang-Wook Ha, Oh-Joon Kwon, Seung-Dueg Choi, Seong Hoon Yi
  • High-Carbon Iron-Based Amorphous Alloy Using Molten Pig Iron and Method of Manufacturing the Same
    Publication number: 20130146185
    Abstract: Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe?C?Si?BxPyCrz, wherein ?, ?, ?, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein a is expressed by ?=100?(?+?+x+y+z) atomic %, ? is expressed by 13.5 atomic %???17.8 atomic %, ? is expressed by 0.30 atomic %???1.50 atomic %, x is expressed by 0.1 atomic %?x?4.0 atomic %, y is expressed by 0.8 atomic %?y?7.7 atomic %, and z is expressed by 0.1 atomic %?z?3.0 atomic %.
    Type: Application
    Filed: June 27, 2011
    Publication date: June 13, 2013
    Applicant: POSCO
    Inventors: Sang-Won Kim, Gab-Sik Byun, Young-Geun Son, Eon-Byeong Park, Sang-Hoon Yoon, Sang-Wook Ha, Oh-Joon Kwon, Seung-Dueg Choi, Seong Hoon Yi
  • Method for Manufacturing Amorphous Alloy by Using Liquid Pig Iron
    Publication number: 20120167717
    Abstract: The present invention relates to a method for manufacturing an amorphous alloy by using liquid pig iron. The exemplary embodiment of the present invention provides a method for manufacturing an amorphous alloy, including providing liquid pig iron, adding an alloy material to the liquid pig iron, and solidifying the liquid pig iron.
    Type: Application
    Filed: December 28, 2009
    Publication date: July 5, 2012
    Applicant: POSCO
    Inventors: Sang-Ho Yi, Seung Dueg Choi, Seong Hoon Yi