Patents by Inventor Seok-Keun Koh
Seok-Keun Koh 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: 20230310321Abstract: Provided herein is a coated particle comprising: (i) a microparticle that comprises a pharmaceutically acceptable excipient and (ii) nanoparticles of a therapeutic agent, wherein the surface of the microparticle is coated with the nanoparticles. Also provided herein is a pharmaceutical composition comprising the coated particle. Furthermore, provided herein are methods of their preparation.Type: ApplicationFiled: May 24, 2023Publication date: October 5, 2023Applicant: Nano PharmaSolutions, Inc.Inventors: Kay Olmstead, Saeyeon Lee, Seok-Keun Koh
-
Publication number: 20210290543Abstract: Provided herein is a coated particle comprising: (i) a microparticle that comprises a pharmaceutically acceptable excipient and (ii) nanoparticles of a therapeutic agent, wherein the surface of the microparticle is coated with the nanoparticles. Also provided herein is a pharmaceutical composition comprising the coated particle. Furthermore, provided herein are methods of their preparation.Type: ApplicationFiled: February 18, 2021Publication date: September 23, 2021Applicant: Nano PharmaSolutions, Inc.Inventors: Kay Olmstead, Saeyeon Lee, Seok-Keun Koh
-
METHOD OF MANUFACTURING ANTIBACTERIAL SUPERABSORBENT POLYMER ABSORBER CONTAINING METAL NANOPARTICLES
Publication number: 20190345600Abstract: The present invention relates to a method of manufacturing a superabsorbent polymer absorber containing metal nanoparticles and an application of the superabsorbent polymer absorber which is manufactured by the same and has antibacterial, sterilization, far infrared ray emission, prevention of blood oxidation, and mineral releasing functions. Specifically, the present invention relates to a technique in which metal nanoparticles such as copper, brass, bronze, silver, gold, germanium, and zinc are formed on the superabsorbent polymer by using a water-free manufacturing method, then, when the superabsorbent polymer absorbs water, the metal nanoparticles are naturally and uniformly dispersed, thereby allowing the superabsorbent polymer to exhibit inherent properties of the metal nanoparticles, and an application thereof.Type: ApplicationFiled: April 19, 2019Publication date: November 14, 2019Inventors: Seok Keun Koh, You Jin Oh, Hyung Deok Kim -
Patent number: 10411266Abstract: Provided are: a dry reforming catalyst, in which a noble metal (M) is doped in a nickel yttria stabilized zirconia complex (Ni/YSZ) and an alloy (M-Ni alloy) of the noble metal (M) and nickel is formed at Ni sites on a surface of the nickel yttria stabilized zircona (YSZ); a method for producing the dry reforming catalyst using the noble metal/glucose; and a method for performing dry reforming using the catalyst. The present invention can exhibit a significantly higher dry reforming activity as compared with Ni/YSZ catalysts. Furthermore, the present invention can have an improved long-term performance by suppressing or preventing the deterioration. Furthermore, the preparing method is useful in performing the alloying of noble metal with Ni at Ni sites on the Ni/YSZ surface and can simplify the preparing process, and thus is suitable in mass production.Type: GrantFiled: March 4, 2015Date of Patent: September 10, 2019Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Suk Woo Nam, Chang Won Yoon, Yeong Cheon Kim, Yong Min Kim, Jonghee Han, Sung Pil Yoon, Hyung Chul Ham, Jihoon Jeong, Seok-Keun Koh
-
Publication number: 20180269493Abstract: Provided are: a dry reforming catalyst, in which a noble metal (M) is doped in a nickel yttria stabilized zirconia complex (Ni/YSZ) and an alloy (M-Ni alloy) of the noble metal (M) and nickel is formed at Ni sites on a surface of the nickel yttria stabilized zircona (YSZ); a method for producing the dry reforming catalyst using the noble metal/glucose; and a method for performing dry reforming using the catalyst. The present invention can exhibit a significantly higher dry reforming activity as compared with Ni/YSZ catalysts. Furthermore, the present invention can have an improved long-term performance by suppressing or preventing the deterioration. Furthermore, the preparing method is useful in performing the alloying of noble metal with Ni at Ni sites on the Ni/YSZ surface and can simplify the preparing process, and thus is suitable in mass production.Type: ApplicationFiled: March 4, 2015Publication date: September 20, 2018Inventors: Suk Woo NAM, Chang Won YOON, Yeong Cheon KIM, Yong Min KIM, Jonghee HAN, Sung Pil YOON, Hyung Chul HAM, Jihoon JEONG, Seok-Keun KOH
-
Patent number: 9413014Abstract: The present disclosure relates to a method and an apparatus for preparing nanosized metal or alloy nanoparticles by depositing metal or alloy nanoparticles with superior size uniformity on the surface of a powder as a base material by vacuum deposition and then dissolving or melting the base material using a solvent or heat. The method solves the problems of the existing expensive multi-step synthesis method based on chemical reduction and allows effective synthesis of metal or alloy nanoparticles with very uniform size and metal or alloy catalyst nanoparticles supported on carbon at low cost.Type: GrantFiled: February 4, 2014Date of Patent: August 9, 2016Assignees: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, GL MATERIALS INC.Inventors: Sung Jong Yoo, Hee-young Park, Jong Hyun Jang, Hyoung-Juhn Kim, Tae-Hoon Lim, Sang Young Lee, Sang Hyun Ahn, Namgee Jung, Suk Woo Nam, Eun Ae Cho, Seok Keun Koh
-
Publication number: 20080254219Abstract: The present invention relates to a method and device for preparing powder by depositing nano metal, alloy, ceramic particles that are excellent in size uniformity, on a surface of the powder that is a base, using a vacuum deposition method. In particular, the present invention provides a method and device for preparing the powder on which the nano metal, alloy, and ceramic particles of a very uniform size are deposited, by simultaneously performing deposition and agitation using an effective agitation means for solving a disadvantage of a conventional method where deposition and agitation are separately performed. Also, the present invention provides a method and device for preparing the powder on which nano particles are deposited, in which a nano characteristic is kept by preventing a coalescence phenomenon of nano particles even when a deposition time for increasing contents of the nano particles increases in their preparation.Type: ApplicationFiled: October 16, 2006Publication date: October 16, 2008Applicant: P & I CORPORATIONInventors: Seok Keun Koh, Young Whoan Beag, Jun Sik Cho, Jae Ho Joo, Young Gun Han, Jung Hwan Lee, Un Jung Yo
-
Patent number: 7309405Abstract: Disclosed is a method of forming an ITO film by optimized sequential sputter deposition of seed and bulk layers having different sputter process conditions, which is applicable to various display devices, and more particularly, to an organic light-emitting device needing an ultra-planarized surface roughness. In forming a transparent conducting electrode of a display device on a transparent substrate with an ITO film including a seed layer and a bulk layer, a method of forming the ITO film includes a first sputter deposition step of forming the ITO film on the substrate with sputtering gas supplied to an ion source at an ambience of oxygen flowing in the vicinity of the substrate and a second sputter deposition step of forming the ITO film with the sputtering gas supplied to the ion source only, wherein the first and second sputter deposition steps have different process conditions, respectively and wherein the seed and bulk layers are deposited by the first or second sputter deposition step.Type: GrantFiled: January 7, 2004Date of Patent: December 18, 2007Assignee: P & I Corp.Inventors: Jun-Sik Cho, Young-Gun Han, Young-Whoan Beag, Seok-Keun Koh
-
Patent number: 7178584Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: GrantFiled: September 30, 2004Date of Patent: February 20, 2007Assignees: Korea Institute of Science and Technology, LG Electronics Inc.Inventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20050061024Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: ApplicationFiled: September 30, 2004Publication date: March 24, 2005Inventors: Seok-Keun Koh, Hyung Jung, Won Choi, Byung Kang, Ki Kim, Sam Ha, Cheol Kim, Sung-Chang Choi
-
Patent number: 6841789Abstract: An apparatus for surface modification of a polymer, metal and ceramic material using an ion beam (IB) is disclosed, which is capable of supplying and controlling a voltage (220) applied to a material to be surface-modified so that an ion beam (IB) energy irradiated to the material is controlled, differentiating the degree of the vacuum of a reaction gas in a portion of a vacuum chamber in which the ion beam is irradiated from that in a portion in which the ion beam is generated, and also being applicable for both-side irradiating processing and continuous processing.Type: GrantFiled: September 21, 2001Date of Patent: January 11, 2005Assignee: Korea Institute of Science and TechnologyInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Jung Cho
-
Patent number: 6787441Abstract: A method of depositing indium oxide or indium tin oxide thin film on a polymer substrate is disclosed. In the method, oxygen or argon ion beam is radiated on a polymer substrate by a constant accelerating energy in a vacuum state to modify the surface of the polymer substrate, on which an IO thin film or an ITO thin film is deposited while oxygen ion beam, argon ion beam or their mixture ion beam is being radiated in a vacuum state. In addition, ion beam is generated from a cold cathode ion source by using argon, oxygen or their mixture gas and sputtered at a target substance composed of In2O3 or In2O3 and SnO2, thereby an IO or an ITO thin film can be deposited on the surface-modified polymer substrate.Type: GrantFiled: November 13, 2002Date of Patent: September 7, 2004Assignee: Korea Institute of Science and TechnologyInventors: Seok-Keun Koh, Young-Whoan Beag, Jun-Sik Cho, Young-Gun Han
-
Publication number: 20040140198Abstract: Disclosed is a method of forming an ITO film by optimized sequential sputter deposition of seed and bulk layers having different sputter process conditions, which is applicable to various display devices, and more particularly, to an organic light-emitting device needing an ultra-planarized surface roughness. In forming a transparent conducting electrode of a display device on a transparent substrate with an ITO film including a seed layer and a bulk layer, a method of forming the ITO film includes a first sputter deposition step of forming the ITO film on the substrate with sputtering gas supplied to an ion source at an ambience of oxygen flowing in the vicinity of the substrate and a second sputter deposition step of forming the ITO film with the sputtering gas supplied to the ion source only, wherein the first and second sputter deposition steps have different process conditions, respectively and wherein the seed and bulk layers are deposited by the first or second sputter deposition step.Type: ApplicationFiled: January 7, 2004Publication date: July 22, 2004Inventors: Jun-Sik Cho, Young-Gun Han, Young-Whoan Beag, Seok-Keun Koh
-
Publication number: 20040099216Abstract: Disclosed is an apparatus for modifying a surface of a material enabling to improve an ion beam treated effect and efficiency of a surface modified material by installing a gas distributor distributing a reactive gas uniformly, an exhaust valve controlling an exhaust speed of the reactive gas, or a plurality of ion beam treatment areas providing various surface modification effects.Type: ApplicationFiled: November 6, 2003Publication date: May 27, 2004Inventors: Seok-Keun Koh, Jun-Sik Cho, Young-Whoan Beag
-
Publication number: 20030070911Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and airconditioning such as in constructing heat exchanges, by using a DC discharge plasma, compriding the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or flourine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerixable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-plymerizable gas, and then forming a polymeType: ApplicationFiled: July 3, 2002Publication date: April 17, 2003Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20030066746Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: ApplicationFiled: July 3, 2002Publication date: April 10, 2003Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20030042129Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: ApplicationFiled: July 3, 2002Publication date: March 6, 2003Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20030000825Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: ApplicationFiled: July 3, 2002Publication date: January 2, 2003Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20020189931Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a polyType: ApplicationFiled: July 3, 2002Publication date: December 19, 2002Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Byung Ha Kang, Ki Hwan Kim, Sam Chul Ha, Cheol Hwan Kim, Sung-Chang Choi
-
Publication number: 20020014597Abstract: An apparatus for surface modification of a polymer, metal and ceramic material using an ion beam (IB) is disclosed, which is capable of supplying and controlling a voltage (220) applied to a material to be surface-modified so that an ion beam (IB) energy irradiated to the material is controlled, differentiating the degree of the vacuum of a reaction gas in a portion of a vacuum chamber in which the ion beam is irradiated from that in a portion in which the ion beam is generated, and also being applicable for both-side irradiating processing and continuous processing.Type: ApplicationFiled: September 21, 2001Publication date: February 7, 2002Applicant: Korea Institute of Science and TechnologyInventors: Seok-Keun Koh, Hyung Jin Jung, Won Kook Choi, Jung Cho