Patents by Inventor Kun You Park
Kun You Park 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).
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Publication number: 20090026662Abstract: The present invention provides a novel hybrid polymer electrolyte, a lithium secondary battery comprising the hybrid polymer electrolyte polymer and their fabrication methods. More particularly, the present invention provides the hybrid polymer electrolyte comprising superfine fibrous porous polymer matrix with particles having diameter of 1-3000 nm, polymers and lithium salt-dissolved organic electrolyte solutions incorporated into the porous polymer matrix. The hybrid polymer electrolyte has advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolytes of a lithium secondary battery and it can be applied to the manufacture of lithium secondary batteries.Type: ApplicationFiled: July 25, 2008Publication date: January 29, 2009Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Kyung Suk Yun, Byung Won Cho, Seong-Mu Jo, Wha Seop Lee, Won Il Cho, Kun You Park, Hyung Sun Kim, Un Seok Kim, Seok Ku Ko, Suk Won Chun, Sung Won Choi
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Patent number: 7279251Abstract: The present invention provides a lithium secondary battery and its fabrication method. More particularly, the present invention provides a lithium secondary battery comprising a super fine fibrous porous polymer separator film and its fabrication method, wherein the porous polymer separator film is fabricated by the following process: a) melting at least one polymer or dissolving at least one polymer with organic solvents to obtain at least one polymeric melt or at least one polymeric solution; b) adding the obtained polymeric melt or polymeric solution to barrels of an electrospinning machine; and c) discharging the polymeric melt or polymeric solution onto a substrate using a nozzle to form a porous separator film. The lithium secondary battery of the present invention has the advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolyte solution of a lithium secondary battery.Type: GrantFiled: May 19, 2000Date of Patent: October 9, 2007Assignee: Korea Institute of Science and TechnologyInventors: Kyung Suk Yun, Byung Won Cho, Seong Mu Jo, Wha Seop Lee, Won Il Cho, Kun You Park, Hyung Sun Kim, Un Seok Kim, Seok Ku Ko, Suk Won Chun, Sung Won Choi
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Patent number: 6841087Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2-tetrafluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1-difluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.Type: GrantFiled: April 19, 2002Date of Patent: January 11, 2005Assignee: Korea Institute of Science and TechnologyInventors: Byung-Gwon Lee, Jong-Sung Lim, Byoung Sung Ahn, Kun You Park, Chang-Nyeon Kim
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Publication number: 20030197149Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2-tetrafluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1-difluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.Type: ApplicationFiled: April 19, 2002Publication date: October 23, 2003Inventors: Byung-Gwon Lee, Jong-Sung Lim, Byoung Sung Ahn, Kun You Park, Chang-Nyeon Kim
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Patent number: 6592773Abstract: A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).Type: GrantFiled: January 8, 2003Date of Patent: July 15, 2003Assignee: Korea Institute of Science and TechnologyInventors: Byung Gwon Lee, Jong Sung Lim, Kun You Park, Moon Jo Chung, Seong Joon Cho
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Publication number: 20030111635Abstract: A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).Type: ApplicationFiled: January 8, 2003Publication date: June 19, 2003Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Byung Gwon Lee, Jong Sung Lim, Kun You Park, Moon Jo Chung, Seong Joon Cho
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Patent number: 6566567Abstract: The present invention relates to a catalyst for producing 1,1-difluoroethane (HCFC-152a) and producing method thereof. More particularly, it is to provide the catalyst prepared by impregnating palladium on the active carbon pretreated with an aqueous hydrogen fluoride solution and an aqueous hydrogen chloride solution in series and its use in the production of 1,1-difluoroethane (HCFC-142b) by dehydrochlorinating 1,1-difluoro-1-chloroethane at 240-300° C. in the supplying molar ratio of 2-6 (H2/HCFC-142b) with maximizing a selectivity toward the product of HCFC-152a.Type: GrantFiled: July 5, 2001Date of Patent: May 20, 2003Assignee: Korea Institute of Science and TechnologyInventors: Byoung Sung Ahn, Jung Hwan Song, Dong Ju Moon, Kun You Park
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Patent number: 6524495Abstract: A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).Type: GrantFiled: November 9, 2000Date of Patent: February 25, 2003Assignee: Korea Institute of Science and TechnologyInventors: Byung Gwon Lee, Jong Sung Lim, Kun You Park, Moon Jo Chung, Seong Joon Cho
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Publication number: 20020107421Abstract: The present invention relates to a catalyst for producing 1,1-difluoroethane (HCFC-152a) and producing method thereof. More particularly, it is to provide the catalyst prepared by impregnating palladium on the active carbon pretreated with an aqueous hydrogen fluoride solution and an aqueous hydrogen chloride solution in series and its use in the production of 1,1-difluoroethane (HCFC-142b) by dehydrochlorinating 1,1-difluoro-1-chloroethane at 240-300° C. in the supplying molar ratio of 2-6 (H2/HCFC-142b) with maximizing a selectivity toward the product of HCFC-152a.Type: ApplicationFiled: July 5, 2001Publication date: August 8, 2002Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Byoung Sung Ahn, Jung Hwan Song, Dong Ju Moon, Kun You Park
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Patent number: 6306349Abstract: The present invention relates to a catalyst characterization apparatus, and in particular to an improved catalyst characterization apparatus which is capable of characterizing the surface of a catalyst more accurately by a volumetric method without requiring a pre-treatment step which may vary the characteristics of the catalyst as well as without exposing the catalyst in air, by combining a dynamic flow type reactor with a volumetric type adsorption apparatus, whereby it is possible to accurately characterize the catalyst during an actual reaction. It is possible to accurately characterize the various catalysts and to characterize the catalyst during the reaction, alternately and/or continuously, by combining a dynamic flow type reactor with a volumetric type characterization apparatus as well as a dynamic flow type characterization apparatus.Type: GrantFiled: November 29, 1999Date of Patent: October 23, 2001Assignee: Korea Institute of Science and TechnologyInventors: Dong Ju Moon, Kun You Park, Moon Jo Chung, Byoung Sung Ahn
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Patent number: 6231780Abstract: A refrigerant composition useful as a substitute for chlorodifluoromethane (CHCIF2, HCFC-22). The refrigerant mixture has a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent selected from perfluoropropane (C3F8, PFC-218), cyclopropane (C3H6, RC-270) and butane (C4H10, R-600); and a third constituent selected from 1,1-difluoroethane (CH3CHF2, HFC-152a), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb) and bis(difluoromethyl)ether (CHF2OCHF2, HFE-134).Type: GrantFiled: October 1, 1999Date of Patent: May 15, 2001Assignee: Korea Institute of Science and TechnologyInventors: Byung Gwon Lee, Jong Sung Lim, Kun You Park, Byoung Sung Ahn, Sang Deuk Lee
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Patent number: 6156909Abstract: The present invention relates to a method for preparing alkylene carbonate by reacting alkylene oxide with carbon dioxide in the presence of a catalyst system comprising:a) at least one selected from the group consisting of PbY.sub.2, InY.sub.3 and their mixture, wherein Y is Cl, Br or I; andb) at least one alkali metal halide selected from the group consisting of MCl, MBr and MI, wherein M is alkali metal.Type: GrantFiled: January 5, 2000Date of Patent: December 5, 2000Assignee: Korea Institute of Science & TechnologyInventors: Hoon Sik Kim, Jai Jun Kim, Sang Deuk Lee, Kun You Park, Hong Gon Kim
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Patent number: 5959166Abstract: A method for concurrently producing different hydrofluoro carbons, comprising the reaction of halocarbon or hydrohalocarbon with hydrogen fluoride in a reaction system consisting of a series of at least two discrete reactors, in the presence of catalysts, said reactors each being provided with different reactant materials and differing in reaction conditions including the catalysts and/or reaction temperature, thereby flexibly controlling their production rates in accordance with fluctuations in their demand, and eliminating the risk of constructing large scale plants responsible for individual hydrofluorocarbons.Type: GrantFiled: November 7, 1997Date of Patent: September 28, 1999Assignee: Korea Institute of Science and TechnologyInventors: Hoon Sik Kim, Moon Jo Chung, Kun You Park, Young Soo Kwon
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Patent number: 5841007Abstract: The present invention relates to a process for manufacturing 1,1,1,2-tetrafluoroethane (HFC-134a) from trichloroethylene (TCE) and hydrogen fluoride (HF) by reacting the HCFC-133a with the HF to produce the HFC-134a and reacting the TCE with the HF to produce 1-choro-2,2,2-trifluoroethane (HCFC-133a), characterized by that a part of said HF is mixed with the mixture containing the HFC-134a and the remaining portion of said HF is fed with said TCE in portions to at least two sections of a reactor for producing said HCFC-133a. According the present process, the temperature change in the reactor for producing HCFC-133a is maintained within a narrow range over the whole reaction procedures, and the catalytic activity is well maintained. Further, the formation of by-products is considerably prevented and thus the productivity is remarkably enhanced.Type: GrantFiled: April 12, 1996Date of Patent: November 24, 1998Assignee: Korea Institute of Science and TechnologyInventors: Byoung Sung Ahn, Young Soo Kwon, Kun You Park, Moon Jo Chung
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Patent number: 5723702Abstract: There is a process for removing moisture from chlorodifluoromethane (CHClF.sub.2) containing moisture in excess in the preparation of chlorodifluoromethane comprising lowering the partial pressure of water in the chlorodifluoromethane gas by contacting the chlorodifluoromethane gas with an aqueous solution of calcium chloride of more than 5% by weight.Type: GrantFiled: March 13, 1996Date of Patent: March 3, 1998Assignee: Korea Institute of Science and TechnologyInventors: Young Soo Kwon, Kun You Park, Sang-Deuk Lee, Honggon Kim
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Patent number: 5716592Abstract: A process for producing chlorine by reaction of gaseous hydrogen chloride with oxygen in the presence of a catalyst prepared by reaction of chromium trioxide and cerous chloride with ethanol and calcination of the resulting reaction product, or, alternatively, prepared by reaction of chromium trioxide with ethanol, and calcination and impregnation of the resulting chromic oxide with aqueous solution of cerous chloride.Type: GrantFiled: September 9, 1996Date of Patent: February 10, 1998Assignee: Korea Institute Of Science and TechnologyInventors: Byoung Sung Ahn, Dong Ju Moon, Kun You Park, Moon Jo Chung
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Patent number: 5663112Abstract: A novel cerous chloride-chromium oxide catalyst useful for oxidizing hydrogen chloride to chlorine. The catalyst is prepared by the reaction of chromium trioxide and cerous chloride with ethanol and calcining the reaction product. The catalyst is also prepared by the reaction of chromium trioxide with ethanol, then calcination and impregnation of the resultant chromic oxide with aqueous solution of cerous chloride. The obtained catalyst exhibits high activity at low reaction temperature.Type: GrantFiled: November 29, 1994Date of Patent: September 2, 1997Assignee: Korea Institute of Science and TechnologyInventors: Byoung Sung Ahn, Dong Ju Moon, Kun You Park, Moon Jo Chung
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Patent number: 5500400Abstract: There are a catalyst for producing 1,1,1,2-tetrafluoroethane represented as Cr.sub.a L.sub.b M.sub.c O.sub.x F.sub.y wherein L is Mg or Ca; M is one element selected from a group consisting of Ce, Ni, Zn, and Al; and each value of a, b, c, x and y are all between 0 and 2, and a method for preparing the same comprising the steps of: producing an admixture of a composition comprising chromium hydroxide hydrate and magnesium chloride or calcium chloride in a weight ratio of Cr to Mg or Ca ranging from 1:0.3 to 1:10 with an aqueous metal salt solution; reacting the admixture with an aqueous HF solution to give a paste; and sintering the paste.Type: GrantFiled: September 8, 1994Date of Patent: March 19, 1996Assignee: Korea Institute of Science and TechnologyInventors: Hoon Sik Kim, Byung Gwon Lee, Honggon Kim, Kun You Park