Patents by Inventor Yi Sup Han
Yi Sup 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).
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Patent number: 9914743Abstract: Provided herein is a method for preparing a silver complex. The method includes reacting a silver oxide with a mixture of ammonium carbamate and isopropyl amine at room temperature in the presence of methanol.Type: GrantFiled: March 16, 2016Date of Patent: March 13, 2018Assignee: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Publication number: 20160194339Abstract: Provided herein is a method for preparing a silver complex. The method includes reacting a silver oxide with a mixture of ammonium carbamate and isopropyl amine at room temperature in the presence of methanol.Type: ApplicationFiled: March 16, 2016Publication date: July 7, 2016Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Publication number: 20140179944Abstract: The present invention relates to a silver complex obtained by reacting at least one silver compound represented by the formula 2 below with at least one ammonium carbamate compound or ammonium carbonate compound represented by the formula 3, 4 or 5 below: wherein X, R1, R2, R3, R4, R5, and R6 are as defined herein.Type: ApplicationFiled: October 22, 2013Publication date: June 26, 2014Applicant: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seoung-Yong Uhm, Young-Kwan Seo
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Patent number: 8679242Abstract: The present invention relates to a silver complex obtained by reacting at least one silver compound represented by the formula 2 below with at least one ammonium carbamate compound or ammonium carbonate compound represented by the formula 3, 4 or 5 below:Type: GrantFiled: May 11, 2012Date of Patent: March 25, 2014Assignee: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Publication number: 20130022761Abstract: The present invention relates to a silver complex obtained by reacting at least one silver compound represented by the formula 2 below with at least one ammonium carbamate compound or ammonium carbonate compound represented by the formula 3, 4 or 5 below:Type: ApplicationFiled: May 11, 2012Publication date: January 24, 2013Applicant: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Patent number: 8282860Abstract: The present invention relates to a process for preparation of silver nanoparticles and the compositions of silver ink containing the same. The present invention can prepare the silver nanoparticles with various shapes through a simple preparation process, improve the selectivity of the size of the silver nanoparticles, fire the silver nanoparticles even at a low temperature of 150° C. or less during a short time, provide the ink compositions capable of forming the coating or the fine pattern showing the high conductivity, and provide the ink compositions capable of being applied to the reflective film material, the electromagnetic wave shield, and the antimicrobial agent, etc.Type: GrantFiled: August 2, 2007Date of Patent: October 9, 2012Assignee: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Byung Hun Kim, Su Han Kim, Myung Bong Yoo, Nam Boo Cho, Yi Sup Han
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Patent number: 8226755Abstract: The present invention relates to a silver complex obtained by reacting at least one silver compound represented by the formula 2 below with at least one ammonium carbamate compound or ammonium carbonate compound represented by the formula 3, 4 or 5 below:Type: GrantFiled: February 7, 2006Date of Patent: July 24, 2012Assignee: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Patent number: 7955528Abstract: The present invention relates to a variety of conductive ink compositions comprising a metal complex compound having a special structure and an additive and a method for preparing the same, more particularly to conductive ink compositions comprising a metal complex compound obtained by reacting a metal or metal compound with an ammonium carbamate- or ammonium carbonate-based compound and an additive and a method for preparing the same.Type: GrantFiled: March 12, 2010Date of Patent: June 7, 2011Assignee: Inktec Co., LtdInventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo, Nam-Boo Cho
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Publication number: 20100247798Abstract: The present invention relates to a variety of conductive ink compositions comprising a metal complex compound having a special structure and an additive and a method for preparing the same, more particularly to conductive ink compositions comprising a metal complex compound obtained by reacting a metal or metal compound with an ammonium carbamate- or ammonium carbonate-based compound and an additive and a method for preparing the same.Type: ApplicationFiled: March 12, 2010Publication date: September 30, 2010Applicant: INKTEC CO., LTD.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo, Nam-Boo Cho
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Publication number: 20100189901Abstract: The present invention relates to a process for preparation of silver complex compound and the compositions of silver ink containing the same. The present invention includes a) preparing silver complex compound with special structure by reacting silver compound with at least one or two mixtures selected from ammonium carbamate compound, ammonium carbonate compound or ammonium bicarbonate compound and b) preparing silver nano particles by reacting the silver complex compound with reducer or reducing or pyrolyzing the silver complex compound by applying heat thereto. The preparing method according to the present invention can prepare the silver nano practical with various shapes through a simple preparation process, improve the selectivity of the size of the silver complex compound, fire the silver complex compound even when it is fired at a low temperature of 150° C.Type: ApplicationFiled: August 2, 2007Publication date: July 29, 2010Applicant: INKTEC CO., LTD.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Byung Hun Kim, Su Han Kim, Myung Bong Yoo, Nam Boo Cho, Yi Sup Han
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Patent number: 7691294Abstract: The present invention relates to a variety of conductive ink compositions comprising a metal complex compound having a special structure and an additive and a method for preparing the same, more particularly to conductive ink compositions comprising a metal complex compound obtained by reacting a metal or metal compound with an ammonium carbamate- or ammonium carbonate-based compound and an additive and a method for preparing the same.Type: GrantFiled: March 4, 2006Date of Patent: April 6, 2010Assignee: Inktec Co., Ltd.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo, Nam-Boo Cho
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Publication number: 20090120800Abstract: The present invention relates to a silver complex obtained by reacting at least one silver compound represented by the formula 2 below with at least one ammonium carbamate compound or ammonium carbonate compound represented by the formula 3, 4 or 5 below:Type: ApplicationFiled: February 7, 2006Publication date: May 14, 2009Applicant: INKTEC CO., LTD.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo
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Publication number: 20080206488Abstract: The present invention relates to a variety of conductive ink compositions comprising a metal complex compound having a special structure and an additive and a method for preparing the same, more particularly to conductive ink compositions comprising a metal complex compound obtained by reacting a metal or metal compound with an ammonium carbamate- or ammonium carbonate-based compound and an additive and a method for preparing the same.Type: ApplicationFiled: March 4, 2006Publication date: August 28, 2008Applicant: INKTEC CO., LTD.Inventors: Kwang-Choon Chung, Hyun-Nam Cho, Myoung-Seon Gong, Yi-Sup Han, Jeong-Bin Park, Dong-Hun Nam, Seong-Yong Uhm, Young-Kwan Seo, Nam-Boo Cho
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Patent number: 6576216Abstract: A method for manufacturing lithium-manganese oxide powders for use in a lithium secondary battery is provided. The method includes the steps of dissolving in nitric acid a composition selected from the group consisting of: manganese oxide, manganese carbonate, or manganese to form a manganese solution, and then dissolving in the manganese solution a composition selected from the group consisting of lithium carbonate, lithium hydroxide, or lithium acetate. Glycine is added to the mixed metal solution and the mixed metal solution is dried in a vacuum dryer to form a combustible resin. The combustible resin is then ignited at room temperature and the combusted products are calcinated.Type: GrantFiled: January 9, 2001Date of Patent: June 10, 2003Assignee: Korea Advanced Institute of Science &TechnologyInventors: Yi Sup Han, Ho Gi Kim, Kyu Sung Park
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Patent number: 6558843Abstract: A method for manufacturing LiMn2O4 powders for use in a lithium secondary battery positive electrode, is provided, in which oxide or carbonate is used as a positive electrode material, a solution is dried at a temperature higher than 150° C., and the resulting matter is put into a reaction furnace in order to be calcinated for a short time, after treating by spontaneous combustion. A certain degree of crystallization of the positive electrode powders can be obtained in the spontaneous combustion process. Thus, a battery having a large charging and discharging capacity and a long life cycle can be manufactured even under a high current condition.Type: GrantFiled: October 19, 2000Date of Patent: May 6, 2003Assignee: Korea Advanced Institute of Science and TechnologyInventors: Yi Sup Han, Ho Gi Kim
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Publication number: 20020090553Abstract: A method for manufacturing a Li—Mn oxide for use in a lithium secondary battery positive electrode, is provided, in which a proper amount of glycine is dissolved in a solution where lithium and manganese are dissolved in a nitric acid solution, the solution is dried and thermally treated after removing an organic matter with a auto-ignition method, to thereby produce a Li—Mn oxide powder which can provide an optimal battery performance. The positive electrode powders for lithium secondary battery has a considerably short thermal treatment time in comparison with a conventional solid state reaction method, to thereby provide a very inexpensive processing cost, and a battery having a high charge/discharge capacity and a long lifetime even in a high current condition since particles of the powders are very fine.Type: ApplicationFiled: January 9, 2001Publication date: July 11, 2002Inventors: Yi Sup Han, Ho Gi Kim, Kyu Sung Park
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Patent number: 6150048Abstract: Disclosed are a metallic interconnection material for solid oxide fuel cells and a preparation method thereof. The metallic interconnection material has two fine microstructural phases in which 5-25% by volume of LaCrO.sub.3 is dispersed at the grain boundaries of Cr particles. It can be prepared by mixing 75-95% by volume of a Cr powder and 5-25% by volume of an LaCrO.sub.3 powder, together with a solvent and a binder, in a mill, molding the mixture into a predetermined shape after drying, and sintering the molded shape at approximately 1,500.degree. C. for 10 hours in an Ar atmosphere with 5 vol % of hydrogen to give an LaCrO.sub.3 -dispersed Cr alloy. The LaCrO.sub.3 -dispersed Cr alloy shows high electric conductivity by virtue of the growth inhibition of Cr particles during sintering and high chemical stability by virtue of the presence of the rare earth metal, La, meeting meet the requirements for the interconnection materials for solid oxide fuel cells.Type: GrantFiled: July 30, 1999Date of Patent: November 21, 2000Assignee: Korea Institute of Energy ResearchInventors: Rak-Hyun Song, Dong-Ryul Shin, Kwangg-Sun Jeon, Yi-Sup Han, Dokiya Masayuki