Patents by Inventor Do-Suck Han
Do-Suck Han 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: 10274743Abstract: An imaging system includes an indicator installed around an antenna, wherein optical characteristics of the indicator change as a function of an electromagnetic field formed by the antenna, an imaging apparatus for imaging a change in optical characteristics of the indicator, a transmitter for radiating radio waves toward the antenna, and a receiver for receiving a signal from the antenna.Type: GrantFiled: December 20, 2016Date of Patent: April 30, 2019Assignees: Hyundai Motor Company, Sogang University Research FoundationInventors: Sang Heun Lee, Sung-Hoon Jeon, Hanju Lee, Hyun-Wook Jang, Kiejin Lee, Do-Suck Han
-
Publication number: 20180091239Abstract: An imaging system includes an indicator installed around an antenna, wherein optical characteristics of the indicator change as a function of an electromagnetic field formed by the antenna, an imaging apparatus for imaging a change in optical characteristics of the indicator, a transmitter for radiating radio waves toward the antenna, and a receiver for receiving a signal from the antenna.Type: ApplicationFiled: December 20, 2016Publication date: March 29, 2018Inventors: Sang Heun LEE, Sung-Hoon JEON, Hanju LEE, Hyun-Wook JANG, Kiejin LEE, Do-Suck HAN
-
Patent number: 9728825Abstract: A device for indirectly cooling a battery module of an eco-friendly vehicle is provided that cools the battery module using an interfacial plate into which a heat pipe is inserted to maximize battery heat emission performance and simultaneously prevent degradation of battery performance. A thermally-conductive interfacial plate in which a heat pipe is embedded by over-molding is disposed between battery cells and a heat sink, which is a condensation unit, integrally connected to an upper end of the heat pipe is disposed in a cooling air flow path to improve contact strength between the interfacial plate and the battery cells. A planar heat emitter is disposed between the battery cells where the interfacial plate is not disposed to heat the battery to a proper-level temperature in a cold-start environment and a low-temperature environment, thereby improving battery performance and preventing degradation in vehicle power.Type: GrantFiled: October 22, 2013Date of Patent: August 8, 2017Assignee: Hyundai Motor CompanyInventors: Jin Woo Kwak, Do Suck Han, Gun Goo Lee, Kyong Hwa Song, Hyuk Kang, Jeong Hun Seo
-
Patent number: 9580561Abstract: Disclosed is a method for manufacturing a polylactic acid film. More specifically, the present invention relates to a method for stably and effectively obtaining optimized stereocomplex crystals through specified boiling point and evaporation time of a solvent allowing the content of stereocomplex crystals to be 100%.Type: GrantFiled: November 1, 2011Date of Patent: February 28, 2017Assignees: Hyundai Motor Company, KOREA UNIVERSITY OF TECHNOLOGY AND EDUCATION INDUSTRY-UNIVERSITY COOPERATION FOUNDATIONInventors: Chae Hwan Hong, Do Suck Han, Byeong Uk Nam
-
Patent number: 9296935Abstract: Disclosed is a micro particle for a thermal control material capable of being applied as a highly thermal conductive material for thermal control, and an apparatus and a method of producing the micro particle for the thermal control material by using an ultrasonic high-temperature vibration scheme. More specifically, a Boron Nitride (BN) particle having a plate shape and an excellent thermal conductivity is coated on a PCM having a shape of a micro bead, to increase the thermal conduction to the inside PCM, so that a phase change is easily generated, and which allows an easy treatment of the PCM in a liquid state at a temperature equal to or higher than a melting point of the PCM.Type: GrantFiled: December 2, 2014Date of Patent: March 29, 2016Assignee: Hyundai Motor CompanyInventors: Han Saem Lee, Do Suck Han, Jin Woo Kwak, Chi Hoon Choi, Kyong Hwa Song, Byung Sam Choi
-
Publication number: 20160009856Abstract: The present invention provides a method of producing D-type lactide from liquid D-type lactic acid, and a method for producing D-type polylactic acid having a weight average molecular weight of about 50,000˜20,000 g/mol from the produced D-type lactide. The method of the present invention is advantageous in that D-type lactide can be obtained at a high yield by a simple method, compared to the conventional production methods. Consequently, production cost of D-type polylactic acid that is finally obtained from D-type lactide can be reduced.Type: ApplicationFiled: September 21, 2015Publication date: January 14, 2016Inventors: Chae Hwan Hong, Si Hwan Kim, Ji Youn Seo, Do Suck Han
-
Patent number: 9109305Abstract: Disclosed is a method for preparing hollow carbon fibers having an empty space in the cross section thereof. More specifically, the disclosed method includes preparing a spinning solution of an acrylonitrile-based polymer having a viscosity ranging from 2000 to 5000 poise at room temperature; spinning the prepared spinning solution using a spinneret designed for spinning hollow fibers; super-drawing and drawing spun fibers to prepare hollow precursor fibers; and stabilizing and carbonizing the hollow precursor fibers to prepare the hollow carbon fibers. The hollow carbon fibers obtained by the disclosed method have a lower specific gravity by 10 to 50% than conventional hollow carbon fibers (solid), but have similar mechanical properties to the conventional fibers. Furthermore, in the method, the diameter of carbon fibers can be adjusted. Thus, it is possible to widen the application of hollow carbon fibers.Type: GrantFiled: February 14, 2012Date of Patent: August 18, 2015Assignee: Hyundai Motor CompanyInventors: Young-Ho Choi, Do Suck Han, Chi-Hoon Choi
-
Patent number: 9102647Abstract: Disclosed is a method for preparing lactide by using a solvent. According to the method, since an ionic liquid is used as a solvent in a second step in the course of preparing lactide, it is possible to secure mobility of the resulting reactant, and decrease a reaction temperature. In addition, the ionic liquid absorbs moisture generated during the reaction, and thus prevents degradation of lactide which is susceptible to moisture. Furthermore, to the present method allows for the preparation of lactide successively through the continuous supply of lactic acid oligomers. Because the use of an ionic liquid minimizes the contamination of a reactive group with by-products, the use of a solvent for reactor washing is unnecessary. Further, owing to a high boiling point of the ionic liquid, the ionic liquid can be easily harvested and recycled.Type: GrantFiled: October 23, 2013Date of Patent: August 11, 2015Assignee: Hyundai Motor CompanyInventors: Si Hwan Kim, Chae Hwan Hong, Do Suck Han, Ji Yeon Seo
-
Patent number: 9096709Abstract: Disclosed are a polylactide stereocomplex with improved thermal stability and thus improved processability and a method for preparing the same. In order to confer flexibility to polymer chains, D-type polylactide polymer containing a small amount of caprolactone (poly D-lactide-caprolactone copolymer) is synthesized and it is uniformly mixed with L-type single-phase polylactide to prepare a flexible polylactide stereocomplex. Since the polylactide stereocomplex having flexible polymer chains has superior heat resistance and mechanical stability and experiences little decrease of the degree of stereocomplex formation even after thermal processing, the polylactide stereocomplex having improved thermal stability can be advantageously used for engineering plastics requiring high strength and good thermal stability, alternative materials for general-use plastics, high-performance medical materials, or the like because of its remarkably improved processability.Type: GrantFiled: October 21, 2014Date of Patent: August 4, 2015Assignees: Hyundai Motor Company, Korea Institute of Science and TechnologyInventors: Chae Hwan Hong, Do Suck Han, Soo Hyun Kim, Young Mee Jung
-
Publication number: 20150152308Abstract: Disclosed is a micro particle for a thermal control material capable of being applied as a highly thermal conductive material for thermal control, and an apparatus and a method of producing the micro particle for the thermal control material by using an ultrasonic high-temperature vibration scheme. More specifically, a Boron Nitride (BN) particle having a plate shape and an excellent thermal conductivity is coated on a PCM having a shape of a micro bead, to increase the thermal conduction to the inside PCM, so that a phase change is easily generated, and which allows an easy treatment of the PCM in a liquid state at a temperature equal to or higher than a melting point of the PCM.Type: ApplicationFiled: December 2, 2014Publication date: June 4, 2015Inventors: Han Saem Lee, Do Suck Han, Jin Woo Kwak, Chi Hoon Choi, Kyong Hwa Song, Byung Sam Choi
-
Publication number: 20150057385Abstract: Disclosed are a polylactide stereocomplex with improved thermal stability and thus improved processability and a method for preparing the same. In order to confer flexibility to polymer chains, D-type polylactide polymer containing a small amount of caprolactone (poly D-lactide-caprolactone copolymer) is synthesized and it is uniformly mixed with L-type single-phase polylactide to prepare a flexible polylactide stereocomplex. Since the polylactide stereocomplex having flexible polymer chains has superior heat resistance and mechanical stability and experiences little decrease of the degree of stereocomplex formation even after thermal processing, the polylactide stereocomplex having improved thermal stability can be advantageously used for engineering plastics requiring high strength and good thermal stability, alternative materials for general-use plastics, high-performance medical materials, or the like because of its remarkably improved processability.Type: ApplicationFiled: October 21, 2014Publication date: February 26, 2015Inventors: Chae Hwan Hong, Do Suck Han, Soo Hyun Kim, Young Mee Jung
-
Patent number: 8926300Abstract: Disclosed is a micro particle for a thermal control material capable of being applied as a highly thermal conductive material for thermal control, and an apparatus and a method of producing the micro particle for the thermal control material by using an ultrasonic high-temperature vibration scheme. More specifically, a Boron Nitride (BN) particle having a plate shape and an excellent thermal conductivity is coated on a PCM having a shape of a micro bead, to increase the thermal conduction to the inside PCM, so that a phase change is easily generated, and which allows an easy treatment of the PCM in a liquid state at a temperature equal to or higher than a melting point of the PCM.Type: GrantFiled: February 27, 2012Date of Patent: January 6, 2015Assignee: Hyundai Motor CompanyInventors: Han Saem Lee, Do Suck Han, Jin Woo Kwak, Chi Hoon Choi, Kyong Hwa Song, Byung Sam Choi
-
Patent number: 8889797Abstract: Disclosed are a polylactide stereocomplex with improved thermal stability and thus improved processability and a method for preparing the same. In order to confer flexibility to polymer chains, D-type polylactide polymer containing a small amount of caprolactone (poly D-lactide-caprolactone copolymer) is synthesized and it is uniformly mixed with L-type single-phase polylactide to prepare a flexible polylactide stereocomplex. Since the polylactide stereocomplex having flexible polymer chains has superior heat resistance and mechanical stability and experiences little decrease of the degree of stereocomplex formation even after thermal processing, the polylactide stereocomplex having improved thermal stability can be advantageously used for engineering plastics requiring high strength and good thermal stability, alternative materials for general-use plastics, high-performance medical materials, or the like because of its remarkably improved processability.Type: GrantFiled: October 31, 2011Date of Patent: November 18, 2014Assignees: Hyundai Motor Company, Korea Institute of Science and TechnologyInventors: Chae Hwan Hong, Do Suck Han, Soo Hyun Kim, Young Mee Jung
-
Publication number: 20140318746Abstract: A device for indirectly cooling a battery module of an eco-friendly vehicle is provided that cools the battery module using an interfacial plate into which a heat pipe is inserted to maximize battery heat emission performance and simultaneously prevent degradation of battery performance. A thermally-conductive interfacial plate in which a heat pipe is embedded by over-molding is disposed between battery cells and a heat sink, which is a condensation unit, integrally connected to an upper end of the heat pipe is disposed in a cooling air flow path to improve contact strength between the interfacial plate and the battery cells. A planar heat emitter is disposed between the battery cells where the interfacial plate is not disposed to heat the battery to a proper-level temperature in a cold-start environment and a low-temperature environment, thereby improving battery performance and preventing degradation in vehicle power.Type: ApplicationFiled: October 22, 2013Publication date: October 30, 2014Applicant: Hyundai Motor CompanyInventors: Jin Woo Kwak, Do Suck Han, Gun Goo Lee, Kyong Hwa Song, Hyuk Kang, Jeong Hun Seo
-
Publication number: 20140187798Abstract: Disclosed is a method for preparing lactide by using a solvent. According to the method, since an ionic liquid is used as a solvent in a second step in the course of preparing lactide, it is possible to secure mobility of the resulting reactant, and decrease a reaction temperature. In addition, the ionic liquid absorbs moisture generated during the reaction, and thus prevents degradation of lactide which is susceptible to moisture. Furthermore, to the present method allows for the preparation of lactide successively through the continuous supply of lactic acid oligomers. Because the use of an ionic liquid minimizes the contamination of a reactive group with by-products, the use of a solvent for reactor washing is unnecessary. Further, owing to a high boiling point of the ionic liquid, the ionic liquid can be easily harvested and recycled.Type: ApplicationFiled: October 23, 2013Publication date: July 3, 2014Applicant: Hyundai Motor CompanyInventors: Si Hwan Kim, Chae Hwan Hong, Do Suck Han, Ji Yeon Seo
-
Patent number: 8759545Abstract: The present invention provides a method of preparing lactide with a high yield from lactate obtained through a fermentation process. In certain embodiments, the invention provides a method of preparing high-purity lactide with a high yield, wherein the method comprises treating lactate with a specific solvent, using a catalyst, and phase-separating the resultant. In accordance with the invention, costs for manufacturing polylactic acid can be considerably reduced.Type: GrantFiled: August 31, 2012Date of Patent: June 24, 2014Assignee: Hyundai Motor CompanyInventors: Chae Hwan Hong, Si Hwan Kim, Jiyoun Seo, Do Suck Han
-
Patent number: 8673600Abstract: Disclosed is an apparatus and a method for producing lactic acid, wherein only lactic acid is selectively absorbed and separated from fermentation liquor using a lactic acid absorption resin and wherein a neutralizing agent is not used. The present invention does not include a neutralizing process and a process of converting lactate to lactic acid. The method comprises: adding and mixing a culture medium, microorganism and sugar in a fermenter; passing a fermentation liquor through a microorganism filtration unit to remove microorganisms; and selectively absorbing and separating lactic acid from filtered liquid using a lactic acid absorption resin. The apparatus includes a fermenter for lactic acid fermentation; a filtration unit for removing a microorganisms from the fermentation liquor; and a lactic acid absorption resin for selectively absorbing lactic acid from the filtered liquid.Type: GrantFiled: December 18, 2012Date of Patent: March 18, 2014Assignee: Hyundai Motor CompanyInventors: Si Hwan Kim, Chae Hwan Hong, Jiyoun Seo, Do Suck Han
-
Publication number: 20130266995Abstract: The present invention provides a method for producing D-type lactic acid, by a sugar fermentation of sugar. In accordance with the method of the invention, lactic acid produced during the fermentation reaction is selectively absorbed and detached using an active carbon stick. The method does not require steps, such as, lactate concentration and electrodialytic water splitting that are required during the lactic acid fermentation process. According to the invention, D-type lactic acid can be produced in a high purity and with a high yield. Further, the time and cost associated with the separation process can be reduced in a great extent, thereby offering advantageous effects from a commercial perspective.Type: ApplicationFiled: August 29, 2012Publication date: October 10, 2013Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Si Hwan Kim, Jiyoun Seo, Do Suck Han
-
Publication number: 20130267716Abstract: The present invention provides a method of preparing lactide with a high yield from lactate obtained through a fermentation process. In certain embodiments, the invention provides a method of preparing high-purity lactide with a high yield, wherein the method comprises treating lactate with a specific solvent, using a catalyst, and phase-separating the resultant. In accordance with the invention, costs for manufacturing polylactic acid can be considerably reduced.Type: ApplicationFiled: August 31, 2012Publication date: October 10, 2013Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Si Hwan Kim, Jiyoun Seo, Do Suck Han
-
Publication number: 20130266996Abstract: The present invention provides an apparatus and a method for producing lactic acid, wherein only lactic acid is selectively absorbed and separated from fermentation liquor using a lactic acid absorption resin and wherein a neutralizing agent is not used. The present invention does not include a neutralizing process and a process of converting lactate to lactic acid. The method of the present invention comprises the steps of: adding and mixing a culture medium, microorganism and sugar in a fermenter; passing a fermentation liquor through a microorganism filtration unit to remove microorganism through a cross-flow filtration; and selectively absorbing and separating lactic acid from filtered liquid using a lactic acid absorption resin. Accordingly, the separation and purification process of lactic acid from a fermentation liquor for polymerization is simplified. The manufacturing cost is thus reduced.Type: ApplicationFiled: December 18, 2012Publication date: October 10, 2013Applicant: Hyundai Motor CompanyInventors: Si Hwan Kim, Chae Hwan Hong, Jiyoun Seo, Do Suck Han