Doo Sung
Doo Sung Hwang, Seoul KR
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20120141913 | POLYMER ELECTROLYTE MEMBRANE FOR POLYMER ELECTROLYTE FUEL CELL, METHOD OF MANUFACTURING THE SAME AND POLYMER ELECTROLYTE FUEL CELL SYSTEM INCLUDING THE SAME - A polymer electrolyte membrane for a polymer electrolyte fuel cell, a method of manufacturing the same, and a polymer electrolyte fuel cell system including the same are disclosed, and the polymer electrolyte membrane includes a hydrocarbon-based proton conductive polymer membrane. The polymer membrane has a surface contact angle ranging from 80° to 180°. | 06-07-2012 |
20140335439 | POLYMER ION EXCHANGE MEMBRANE AND METHOD OF PREPARING SAME - Disclosed are a polymer ion exchange membrane having a self-hydration capability at a high temperature under low humidity, a method of preparing the polymer ion exchange membrane, and a polymer electrolyte fuel cell system including the polymer ion exchange membrane. The polymer electrolyte membrane includes a hydrocarbon-based proton conductive polymercoating layer, and has a nano-crack on the hydrophobic surface and thus may secure ion conductivity and self-hydration capability under low humidity and remarkably improve electrochemical performance of an electrolyte. | 11-13-2014 |
Doo Sung Jung, Suwon-Si KR
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20140186651 | PRINTED CIRCUIT BOARD HAVING COPPER PLATED LAYER WITH ROUGHNESS AND METHOD OF MANUFACTURING THE SAME - Disclosed herein are a printed circuit board having a copper plated layer with an anchor shaped surface and roughness by forming the copper plated layer having an anisotropic crystalline orientation structure using a plating inhibitor at the time of forming the copper plated layer serving as a circuit wiring and using composite gas plasma and a dilute acid solution, and a method of manufacturing the same. | 07-03-2014 |
20150028686 | COIL TYPE UNIT FOR WIRELESS POWER TRANSMISSION, WIRELESS POWER TRANSMISSION DEVICE, ELECTRONIC DEVICE AND MANUFACTURING METHOD OF COIL TYPE UNIT FOR WIRELESS POWER TRANSMISSION - The present invention relates to a coil type unit for wireless power transmission, a wireless power transmission device, an electronic device, and a manufacturing method of a coil type unit for wireless power transmission. A coil type unit for wireless power transmission according to the present invention includes a coil pattern in the form of a wiring pattern; a magnetic portion having the coil pattern attached to one surface thereof; and an adhesive portion interposed between the magnetic portion and the coil pattern to bond the magnetic portion and the coil pattern, wherein the magnetic portion is formed by laminating one or more conductive sheets with one or more magnetic sheets and integrally firing the laminated sheets, and the magnetic portion has conductive holes in the position, where both ends of the coil pattern are disposed, to electrically connect the both ends of the coil pattern and the conductive sheet. | 01-29-2015 |
20150076919 | COIL TYPE UNIT FOR WIRELESS POWER TRANSMISSION, WIRELESS POWER TRANSMISSION DEVICE, ELECTRONIC DEVICE AND MANUFACTURING METHOD OF COIL TYPE UNIT FOR WIRELESS POWER TRANSMISSION - The present invention relates to a coil type unit for wireless power transmission, a wireless power transmission device, an electronic device, and a manufacturing method of a coil type unit for wireless power transmission. | 03-19-2015 |
Doo Sung Kang, Gyeonggi-Do KR
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20090018339 | Process For Preparing Crystalline Form A Of Lansoprazole - The present invention relates to a process for preparing Crystalline Form A of Lansoprazole. Specifically, the present invention relates to a process for preparing highly pure Crystalline Form A of Lansoprazole in a large scale without any additional conversion step, even by using ethanol in which Crystalline Form B is easily formed. | 01-15-2009 |
Doo Sung Lee, Gwacheon Si KR
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20110150978 | PH-SENSITIVE BLOCK COPOLYMER FORMING POLYIONIC COMPLEX MICELLES AND DRUG OR PROTEIN CARRIER USING THE SAME - Disclosed is a pH-sensitive block copolymer that forms polyionic complex micelles. The block copolymer is prepared by copolymerization of (a) a polyethylene glycol compound, (b) a poly(amino acid) compound, and (c) a heterocyclic alkyl amine compound having the ability to induce the formation of ionic complexes. Further disclosed is a drug or protein carrier using the block copolymer. | 06-23-2011 |
20130022545 | DRUG DELIVERY SYSTEM FOR TREATMENT OF LIVER CANCER BASED ON INTERVENTIONAL INJECTION OF TEMPERATURE AND pH-SENSITIVE HYDROGEL - A drug delivery system for the treatment of liver cancer that is based on interventional injection of a temperature and pH-sensitive hydrogel is provided. The drug delivery system is composed of a block copolymer applicable to hepatic arterial catheterization and a therapeutic agent is loaded inside the drug delivery system, and the drug delivery system is in the sol state outside, and undergoes a phase transition into the gel state inside the hepatic artery, thereby delaying or blocking blood supply of the hepatic artery, and slowly releasing the therapeutic agent during the phase transition into the gel state inside the hepatic artery. | 01-24-2013 |
20130225696 | pH-SENSITIVE POLYMER HYDROGEL WITH DUAL IONIC TRANSITION AND USE THEREOF - Disclosed is a dual-transition polymeric hydrogel. Also, provided is the use of the dual-transition polymeric hydrogel as a carrier for drug delivery and disease diagnosis, or in the preparation of a polymeric hydrogel-type pharmaceutical composition comprising the physiologically active agent loadable into the block copolymer. Being sensitive to pH as well as temperature, the block copolymer can form a more stable hydrogel at suitable temperatures and pH values. In addition, the block copolymer exhibits a dual transition behavior with pH values so that it can carry ionic drugs, proteins, DNA, and markers, whether positively or negatively charged, simultaneously. Therefore, it can be applied to a sustained drug delivery system for sparingly soluble, hydrophobic drugs, and hydrophilic drugs. Further, it is safe to and stable within the body, and is expected to find various applications in the medical field. | 08-29-2013 |
Doo Sung Lee, Gyeonggi-Do KR
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20080274190 | TEMPERATURE AND pH - SENSITIVE BLOCK COPOLYMER HAVING EXCELLENT GEL STRENGTH, METHOD OF PREPARING THE SAME, AND DRUG DELIVERY SYSTEM USING THE SAME - Disclosed herein is a temperature- and pH-sensitive block copolymer having excellent gel strength, including: (a) a poly(ethylene glycol)-based compound (A) or a copolymer (B) of the poly(ethylene glycol)-based compound (A) and a biodegradable polymer; and (b) a polyurethane-based oligomer (C). Further, a method of preparing a temperature and pH-sensitive block copolymer having excellent gel strength, including: (a) synthesizing a poly(ethylene glycol)-based compound (A) or a copolymer (B) of the poly(ethylene glycol)-based compound (A) and a biodegradable polymer; and (b) coupling a polyurethane-based oligomer (C) with the copolymer (B), is disclosed. Also disclosed is a polymer hydrogel type drug delivery system, including: (a) the block copolymer; and (b) a physiologically active substance which can be included in the block copolymer. | 11-06-2008 |
20080293827 | Temperature and Ph Sensitive Block Copolymer and Polymeric Hydrogels Using the Same - Disclosed is a block copolymer formed by coupling the following components with each other: (a) a copolymer (A) of a polyethylene glycol (PEG) type compound with a biodegradable polymer; and (b) at least one oligomer (B) selected from the group consisting of poly(β-amino ester) and poly(amido amine). A method for preparing the same block copolymer, and a polymeric hydrogel type drug composition comprising the temperature and pH-sensitive block copolymer and a physiologically active substance that can be encapsulated with the block copolymer are also disclosed. The multiblock copolymer is obtained by copolymerization of a pH-sensitive poly(β-amino ester) and/or poly(amido amine) type oligomer, a hydrophilic and temperature-sensitive polyethylene glycol type compound and a hydrophobic and biodegradable polymer. Therefore, the block copolymer can form a polymeric hydrogel structure due to its amphiphilicity resulting from the combination of a hydrophilic group and a hydrophobic group in the copolymer and ionization characteristics depending on pH variations, and thus can be used as a drug carrier for target-directed drug delivery depending on pH variations in the body. | 11-27-2008 |
20120027690 | PH-SENSITIVE GRAFT COPOLYMER, MANUFACTURING METHOD FOR SAME, AND POLYMER MICELLES USING METHOD - The present document relates to a manufacturing method for pH-sensitive graft polymer micelles and a polymer micelle-type pharmaceutical composition containing the graft copolymer. The pH-sensitive graft copolymer micelles are usable as various markers and contrast agents for various molecular images for the diagnosis and treatment of diseases and a carrier for delivery of various medicines according to disease. The pH-sensitive graft copolymer forms micelles that can be used in target-oriented diagnosis and medicine release according to changes in the pH of a body. The polymer micelles are provided by inducing a graft copolymer of poly(β-amino ester) compounds which has a solubility in water depending on pH but is incapable of forming the micelles due to a self-assembly phenomenon, and hydrophilic poly(ethylene glycol) compounds. | 02-02-2012 |
Doo Sung Lee, Sucheon-Si KR
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20090066522 | Emergency guidance lamp system for guiding to nearest exit in the event of fire - An emergency guidance lamp system for guiding to the nearest exit in the event of a fire is provided. A fire detection sensor is installed at a specific region such as ceilings or passages of tunnels or large buildings, and detects a fire occurrence and sends a corresponding detection signal. A central control unit receives the detection signal from the fire detection sensor, judges a situation on the fire occurrence based on simulation result data of various numbers of cases of fire occurrence that have been previously performed and stored in an internal memory, and sends red and green lighting control signals most suitable for each guidance lamp apparatus installed at the site. A guidance lamp apparatus is installed on the ceiling, wall surface, or bottom surface of a passage or the like of tunnels or large buildings, and has a red lighting unit and a green lighting unit provided at the body thereof. | 03-12-2009 |
Doo Sung Lee, Suwon-Si KR
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20100233264 | TEMPERATURE AND pH-SENSITIVE BLOCK COPOLYMER HAVING EXCELLENT SAFTY IN VIVO AND HYDROGEL AND DRUG DELIVERY SYSTEM USING THEREOF - Disclosed herein are pH- and temperature-sensitive block copolymer with excellent safety and a method for preparing the same and a hydrogel and a drug carrier using the block copolymer. According to the present invention, the pH- and temperature-sensitive block copolymer comprises: obtained by copolymerization of: (a) polyethylene glycol-based compound (A); and (b) poly (β-amino ester)-based oligomer (B) or poly (amido amine)-based oligomer (C) or coupling of mixture (D) thereof. In order to control biodegradation rate, the block copolymer is mixed with poly (amido amine)-based oligomer instead of the poly (β-amino ester)-based oligomer and then coupling them. | 09-16-2010 |
20110217376 | POLY(AMIDOAMINE) OLIGOMER HYDROGEL FOR DRUG DELIVERY AND DRUG CARRIER USING THE SAME - Disclosed is a temperature- and pH-sensitive hydrogel composed of a poly(amidoamine) oligomer only. The hydrogel is prepared in a simple manner and is readily released from the body. Further disclosed are a method for preparing the hydrogel and a drug carrier using the hydrogel. | 09-08-2011 |
20140080922 | Polypeptide Based Block Copolymer and the Process for the Preparation Thereof, and the Polymer Micelles Using the Same - A polypeptide based block copolymer having biodegradability due to peptidase, a process for the preparation thereof, and polymer micelles using the same are provided. The block copolymer is a block copolymer of a polyethylene glycol-based compound having properties such that the solubility for water is different depending on the pH, but cannot form micelles due to a self-assembly phenomenon; and a polyglutamic acid-based compound formed using an aminolysis reaction of glutamic acid and tertiary amine in which the end of one alkyl group is substituted with NH | 03-20-2014 |