Patents by Inventor Yeon Seok Choi

Yeon Seok 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: 11851623
    Abstract: A technique for manufacturing biocrude oil with an improved heating value and viscosity is disclosed in the present specification. A biocrude oil manufacturing system according to one embodiment includes: a pyrolysis gas generator for generating a pyrolysis gas through a fast pyrolysis reaction from a supplied mixture material; and a biocrude oil generator for generating biocrude oil by condensing the pyrolysis gas generated by the pyrolysis gas generator, wherein the mixture material includes a mixture of biomass and plastics, and the biocrude oil manufacturing system further includes an alcohol supply for supplying an alcohol to the pyrolysis gas generator and/or the biocrude oil generator.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: December 26, 2023
    Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Yeon-Seok Choi, Sangkyu Choi, Soyoung Han, Yeon Woo Jeong
  • Publication number: 20220010221
    Abstract: A technique for manufacturing biocrude oil with an improved heating value and viscosity is disclosed in the present specification. A biocrude oil manufacturing system according to one embodiment includes: a pyrolysis gas generator for generating a pyrolysis gas through a fast pyrolysis reaction from a supplied mixture material; and a biocrude oil generator for generating biocrude oil by condensing the pyrolysis gas generated by the pyrolysis gas generator, wherein the mixture material includes a mixture of biomass and plastics, and the biocrude oil manufacturing system further includes an alcohol supply for supplying an alcohol to the pyrolysis gas generator and/or the biocrude oil generator.
    Type: Application
    Filed: June 7, 2019
    Publication date: January 13, 2022
    Inventors: Yeon-Seok CHOI, Sangkyu CHOI, Soyoung HAN, Yeon Woo JEONG
  • Publication number: 20170026528
    Abstract: A display apparatus including a display, a communication unit configured to communicate with a plurality of terminal devices and receive image contents from the plurality of terminal devices, a storage configured to store the received image contents, and a processor configured to classify the stored image content according to a predetermined criterion and display the image contents through the display.
    Type: Application
    Filed: June 1, 2016
    Publication date: January 26, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyo-muk KIM, Seong-jin PARK, So-yoon EO, Seung-yeon JEONG, Yeon-seok CHOI, Tae-hun KANG, Kwan-min LEE, Hye-jeong LEE
  • Patent number: 9366078
    Abstract: Disclosed is a protection device for a blind string. The protection device includes a bellows tube provided in a tubular structure, allowing the blind string to pass through an inner part thereof, and having a length increased or reduced in a longitudinal direction of the blind string, a first module coupled with a lower end portion of the bellows tube and having an inner part to which an end portion of the blind string is locked, and a second module decoupled from the first module at an upper portion of the first module while the bellows tube is interposed between the first module and the second module, such that the bellows tube is folded. The bellows tube has a difference in the thickness of the skin thereof such that the bellows tube is automatically spread due to elasticity thereof when the second module is moved up from the first module.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: June 14, 2016
    Inventors: Yeon Seok Choi, Sung Hee Han, Doo Jin Kim
  • Publication number: 20150247361
    Abstract: Disclosed is a protection device for a blind string. The protection device includes a bellows tube provided in a tubular structure, allowing the blind string to pass through an inner part thereof, and having a length increased or reduced in a longitudinal direction of the blind string, a first module coupled with a lower end portion of the bellows tube and having an inner part to which an end portion of the blind string is locked, and a second module decoupled from the first module at an upper portion of the first module while the bellows tube is interposed between the first module and the second module, such that the bellows tube is folded. The bellows tube has a difference in the thickness of the skin thereof such that the bellows tube is automatically spread due to elasticity thereof when the second module is moved up from the first module.
    Type: Application
    Filed: April 4, 2014
    Publication date: September 3, 2015
    Inventors: Yeon Seok CHOI, Sung Hee Han, Doo Jin Kim
  • Patent number: 9040132
    Abstract: Disclosed are a medical multilayer film and use thereof. More specifically, disclosed are a medical multilayer film including: an outer layer comprising a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, an intermediate layer comprising 10 to 60% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof and 40 to 90% by weight of a thermoplastic elastomer, and an inner layer comprising 60 to 80% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, 10 to 30% by weight of polyethylene, and 1 to 10% by weight of a thermoplastic elastomer, and use thereof.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: May 26, 2015
    Assignee: JW LIFE SCIENCE CORPORATION
    Inventors: Yeon-Seok Choi, Hye-Kyung Kim, Eun-O Kim
  • Patent number: 9005313
    Abstract: A device for preparing bio-oil, a system for preparing bio-oil and a method for preparing bio-oil using the same are provided. Biomass is supplied to an inclined portion of a reactor, and high-temperature hot sand is supplied to an upper side of the biomass supplied to the inclined portion. Then, a heater heats the inclined portion. Thus, the fast pyrolysis performance of the biomass can be enhanced, thereby increasing the yield of bio-oil. Also, combustion gas produced from the heater is supplied to the interior of the reactor, so that the interior of the reactor can be simply formed under a nonoxidizing atmosphere. Accordingly, the device for preparing bio-oil can be manufactured into a very simple structure.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: April 14, 2015
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Hang-Seok Choi, Yeon-Seok Choi, Seock-Joon Kim, Hun-Che Park, So-Young Han
  • Publication number: 20120066963
    Abstract: A device for preparing bio-oil, a system for preparing bio-oil and a method for preparing bio-oil using the same are provided. Biomass is supplied to an inclined portion of a reactor, and high-temperature hot sand is supplied to an upper side of the biomass supplied to the inclined portion. Then, a heater heats the inclined portion. Thus, the fast pyrolysis performance of the biomass can be enhanced, thereby increasing the yield of bio-oil. Also, combustion gas produced from the heater is supplied to the interior of the reactor, so that the interior of the reactor can be simply formed under a nonoxidizing atmosphere. Accordingly, the device for preparing bio-oil can be manufactured into a very simple structure.
    Type: Application
    Filed: May 26, 2010
    Publication date: March 22, 2012
    Applicant: Korea Institute of Machinery & Materials
    Inventors: Hang-Seok Choi, Yeon-Seok Choi, Seock-Joon Kim, Hun-Che Park, So-Young Han
  • Publication number: 20120034404
    Abstract: Disclosed are a medical multilayer film and use thereof. More specifically, disclosed are a medical multilayer film including: an outer layer comprising a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, an intermediate layer comprising 10 to 60% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof and 40 to 90% by weight of a thermoplastic elastomer, and an inner layer comprising 60 to 80% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, 10 to 30% by weight of polyethylene, and 1 to 10% by weight of a thermoplastic elastomer, and use thereof.
    Type: Application
    Filed: March 24, 2010
    Publication date: February 9, 2012
    Applicant: JW LIFE SCIENCE CORPORATION
    Inventors: Yeon-Seok Choi, Hye-kyung Kim, Eun-o Kim
  • Publication number: 20020070127
    Abstract: Disclosed are a reactor and a method for processing hazardous gas, capable of improving a removing rate of the hazardous gas and the selectivity of a reacting process using a dielectric heat produced by a non-thermal plasma and a catalyst at a process of decomposing the hazardous gas. The reactor comprises a body having an inlet and an outlet; a plurality of planar electrodes arranged parallel in the body and spaced apart from each other at a certain interval, in which the plurality of planar electrodes are alternately connected to an alternating current power, and a ground such that every other planar electrode is connected to the alternating current power and the remaining planar electrodes are connected to the ground; and a power supply unit for applying a voltage of an alternating current frequency to the planar electrodes.
    Type: Application
    Filed: September 27, 2001
    Publication date: June 13, 2002
    Inventors: Young-Hoon Song, Min-Suk Cha, Jae-Ok Lee, Yeon-Seok Choi, Wan-Ho Shin, Kwan-Tae Kim, Seock-Joon Kim
  • Patent number: 6395144
    Abstract: Disclosed is a non-thermal plasma method for treating a toxic compounds-containing gas; the method comprising the steps of: filling alkali earth metal catalysts and dielectrics within a plasma reactor; the alkali earth metal catalysts being made by substituting alkali earth metal cations for cations of aluminum/silicon molecular sieves used as carriers; introducing a toxic compounds-containing gas into the plasma reactor; and supplying AC power or pulse power to the plasma reactor generating a non-thermal plasma and thus decomposing or oxidizing the toxic compounds. Also to stabilize the plasma more during the non-thermal plasma process and to enhance treatment efficiency of the toxic compounds, the catalysts substituted by the alkali earth metal are filled together with the well-known dielectrics within the plasma reactor; the alkali earth metal catalysts being electrically less conductive and inexpensive.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: May 28, 2002
    Assignee: Korea Institute of Machinery and Materials
    Inventors: Hun Jung Yi, Yeon Seok Choi, Young Hoon Song, Seock Joon Kim