Patents by Inventor Seung-Woong Yoon
Seung-Woong Yoon 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: 11943976Abstract: A display device includes a substrate, a first conductive layer on the substrate, the first conductive layer including a data signal line, a first insulating layer on the first conductive layer, a semiconductor layer on the first insulating layer, the semiconductor layer including a first semiconductor pattern, a second insulating layer on the semiconductor layer, and a second conductive layer on the second insulating layer, the second conductive layer including a gate electrode disposed to overlap the first semiconductor pattern, a transistor first electrode disposed to overlap a part of the first semiconductor pattern, wherein the transistor first electrode is electrically connected to the data signal line through a contact hole that penetrates the first and second insulating layers, and a transistor second electrode disposed to overlap another part of the first semiconductor pattern.Type: GrantFiled: June 4, 2020Date of Patent: March 26, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seung Sok Son, Woo Geun Lee, Seul Ki Kim, Kap Soo Yoon, Hyun Woong Baek, Jae Hyun Lee, Su Jung Jung, Jung Kyoung Cho, Seung Ha Choi, June Whan Choi
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Patent number: 11148126Abstract: Disclosed are a catalyst system capable of selectively oligomerizing olefins including ethylene and a method for preparing an olefin oligomer by using the same and, specifically, a novel catalyst system capable of trimerizing and tetramerizing olefins, unlike olefin oligomerization catalyst systems that have been reported so far, and a method for preparing an olefin oligomer by using the same. The present invention provides a catalyst system for olefin oligomerization, the catalyst system comprising: a ligand compound represented by chemical formula 1; a chromium compound; a metal alkyl compound; and an aliphatic or alicyclic hydrocarbon solvent.Type: GrantFiled: April 10, 2020Date of Patent: October 19, 2021Assignee: LOTTE CHEMICAL CORPORATIONInventors: Tae Jin Kim, Hee Young Kim, Seung Woong Yoon
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Patent number: 11117846Abstract: Disclosed are a catalyst system capable of selectively oligomerizing olefins including ethylene and a method for preparing an olefin oligomer by using the same and, specifically, a novel catalyst system capable of trimerizing and tetramerizing olefins, unlike olefin oligomerization catalyst systems that have been reported so far, and a method for preparing an olefin oligomer by using the same. The present invention provides a catalyst system for olefin oligomerization, the catalyst system comprising: a ligand compound represented by chemical formula 1 or 2; a chromium compound; a metal alkyl compound; and an aliphatic or alicyclic hydrocarbon solvent.Type: GrantFiled: October 11, 2018Date of Patent: September 14, 2021Assignee: LOTTE CHEMICAL CORPORATIONInventors: Hee Young Kim, Tae Jin Kim, Seung Woong Yoon
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Patent number: 10981155Abstract: Disclosed are a novel catalyst system which is a catalyst system for selectively oligomerizing olefin including ethylene and may trimerize and tetramerize olefin, different from the catalyst system for olefin oligomerization reported until now, and a method for preparing an olefin oligomer using same. The present invention provides a catalyst system for olefin oligomerization, including a ligand compound represented by Formula 1; a chromium compound; and a metal alkyl compound, and a method for preparing an olefin oligomer using same.Type: GrantFiled: September 14, 2017Date of Patent: April 20, 2021Assignee: LOTTE CHEMICAL CORPORATIONInventors: Hee Young Kim, Min Jae Shin, Tae Jin Kim, Seung Woong Yoon
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Patent number: 10981154Abstract: Disclosed are a novel catalyst system which is a catalyst system for selectively oligomerizing olefin including ethylene and may trimerize and tetramerize olefin, different from the catalyst system for olefin oligomerization reported until now, and a method for preparing an olefin oligomer using same. The present invention provides a catalyst system for olefin oligomerization, including a ligand compound represented by Formula 1 or 2; a chromium compound; and a metal alkyl compound, and a method for preparing an olefin oligomer using same.Type: GrantFiled: September 14, 2017Date of Patent: April 20, 2021Assignee: LOTTE CHEMICAL CORPORATIONInventors: Min Jae Shin, Hee Young Kim, Tae Jin Kim, Seung Woong Yoon
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Publication number: 20200255356Abstract: Disclosed are a catalyst system capable of selectively oligomerizing olefins including ethylene and a method for preparing an olefin oligomer by using the same and, specifically, a novel catalyst system capable of trimerizing and tetramerizing olefins, unlike olefin oligomerization catalyst systems that have been reported so far, and a method for preparing an olefin oligomer by using the same. The present invention provides a catalyst system for olefin oligomerization, the catalyst system comprising: a ligand compound represented by chemical formula 1 or 2; a chromium compound; a metal alkyl compound; and an aliphatic or alicyclic hydrocarbon solvent.Type: ApplicationFiled: October 11, 2018Publication date: August 13, 2020Applicant: LOTTE CHEMICAL CORPORATIONInventors: Hee Young Kim, Tae Jin Kim, Seung Woong Yoon
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Publication number: 20200238264Abstract: Disclosed are a catalyst system capable of selectively oligomerizing olefins including ethylene and a method for preparing an olefin oligomer by using the same and, specifically, a novel catalyst system capable of trimerizing and tetramerizing olefins, unlike olefin oligomerization catalyst systems that have been reported so far, and a method for preparing an olefin oligomer by using the same. The present invention provides a catalyst system for olefin oligomerization, the catalyst system comprising: a ligand compound represented by chemical formula 1; a chromium compound; a metal alkyl compound; and an aliphatic or alicyclic hydrocarbon solvent.Type: ApplicationFiled: April 10, 2020Publication date: July 30, 2020Applicant: LOTTE CHEMICAL CORPORATIONInventors: Tae Jin Kim, Hee Young Kim, Seung Woong Yoon
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Patent number: 10646857Abstract: The present invention relates to a catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene and 1-octene while having excellent catalytic activity, thereby enabling more efficient preparation of alpha-olefins.Type: GrantFiled: September 21, 2016Date of Patent: May 12, 2020Assignee: LOTTE CHEMICAL CORPORATIONInventors: Min Jae Shin, Tae-Jin Kim, Seung Woong Yoon
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Publication number: 20190275507Abstract: Disclosed are a novel catalyst system which is a catalyst system for selectively oligomerizing olefin including ethylene and may trimerize and tetramerize olefin, different from the catalyst system for olefin oligomerization reported until now, and a method for preparing an olefin oligomer using same. The present invention provides a catalyst system for olefin oligomerization, including a ligand compound represented by Formula 1; a chromium compound; and a metal alkyl compound, and a method for preparing an olefin oligomer using same.Type: ApplicationFiled: September 14, 2017Publication date: September 12, 2019Applicant: LOTTE CHEMICAL CORPORATIONInventors: Hee Young Kim, Min Jae Shin, Tae Jin Kim, Seung Woong Yoon
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Publication number: 20190224658Abstract: Disclosed are a novel catalyst system which is a catalyst system for selectively oligomerizing olefin including ethylene and may trimerize and tetramerize olefin, different from the catalyst system for olefin oligomerization reported until now, and a method for preparing an olefin oligomer using same. The present invention provides catalyst system for olefin oligomerization, including ligand compound represented by Formula 1 or 2; a chromium compound; and a metal alkyl compound, and a method for preparing an olefin oligomer using same.Type: ApplicationFiled: September 14, 2017Publication date: July 25, 2019Applicant: LOTTE CHEMICAL CORPORATIONInventors: Min Jae Shin, Hee Young Kim, Tae Jin Kim, Seung Woong Yoon
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Publication number: 20180229226Abstract: The present invention relates to a catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene and 1-octene while having excellent catalytic activity, thereby enabling more efficient preparation of alpha-olefins.Type: ApplicationFiled: September 21, 2016Publication date: August 16, 2018Inventors: Min Jae SHIN, Tae-Jin KIM, Seung Woong YOON
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Publication number: 20170204023Abstract: The present disclosure relates to a catalyst composition including an organic ligand compound of a specific chemical structure; and a chromium compound and a method for synthesizing alpha-olefin using the catalyst composition, and when the catalyst composition is used, alpha-olefin may be stably synthesized with high selectivity and reaction activity.Type: ApplicationFiled: July 18, 2014Publication date: July 20, 2017Applicant: LOTTE CHEMICAL CORPORATIONInventors: Tae-jin KIM, Min-jae SHIN, Seung-woong YOON
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Patent number: 9243105Abstract: Disclosed herein are a novel complex metal oxide catalyst, and a method of preparing polyester using the same. The metal-bound compound of the present invention has a higher catalytic activity as compared to an antimony catalyst and existing titanium catalysts to be easily synthesized and stabilized, have a sufficient polymerization activity even with a small amount, and be used as an environmentally friendly catalyst for polyester polymerization. In addition, when preparing polyester by using the complex metal oxide of the present invention, since catalytic activity caused by phosphorus (P) which is a thermal stabilizer used to decrease pyrolysis at the time of hot-melting and molding is not deteriorated, an excessive amount of phosphorus may be used as compared to the related art, such that pyrolysis less occurs, whereby the yellowing phenomenon may be decreased and high viscosity may be maintained.Type: GrantFiled: April 10, 2013Date of Patent: January 26, 2016Assignee: LOTTE CHEMICAL CORPORATIONInventors: Young Keun Yang, Seung Woong Yoon, Yong Taek Hwang, Kyung Ho Lim, Jong Ho Bae
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Patent number: 9062025Abstract: The present invention relates to a supported catalyst for olefin polymerization to which a novel transition metal compound and a co-catalyst compound are bound, and a preparation method for polyolefin using the supported catalyst. The transition metal compound bound to the catalyst of the present invention provides high activity for olefin-based monomers in heterogeneous reaction as well as in homogeneous system. Particularly, a polyolefin with higher molecular weight can be prepared by using the supported catalyst containing the transition metal compound bound to a support, rather than using the novel transition metal compound in a non-supported status, or the conventional transition metal compound in a supported or non-supported status.Type: GrantFiled: April 12, 2011Date of Patent: June 23, 2015Assignee: Lotte Chemical CorporationInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Young-Kook Kim, Hwa-Kyu Kim, In-Sung Nam, Seung-Woong Yoon
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Publication number: 20150051366Abstract: Disclosed herein are a novel complex metal oxide catalyst, and a method of preparing polyester using the same. The metal-bound compound of the present invention has a higher catalytic activity as compared to an antimony catalyst and existing titanium catalysts to be easily synthesized and stabilized, have a sufficient polymerization activity even with a small amount, and be used as an environmentally friendly catalyst for polyester polymerization. In addition, when preparing polyester by using the complex metal oxide of the present invention, since catalytic activity caused by phosphorus (P) which is a thermal stabilizer used to decrease pyrolysis at the time of hot-melting and molding is not deteriorated, an excessive amount of phosphorus may be used as compared to the related art, such that pyrolysis less occurs, whereby the yellowing phenomenon may be decreased and high viscosity may be maintained.Type: ApplicationFiled: April 10, 2013Publication date: February 19, 2015Inventors: Young Keun Yang, Seung Woong Yoon, Yong Taek Hwang, Kyung Ho Lim, Jong Ho Bae
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Patent number: 8916662Abstract: The present invention relates to a preparation method for olefin-diene copolymer that comprises polymerizing at least one olefin-based monomer and at least one diene-based monomer in the presence of a catalyst comprising a novel transition metal compound. Using the novel transition metal compound as a catalyst, the preparation method for olefin-diene copolymer according to the present invention can not only acquire high catalytic activity for copolymerization of the olefin and diene monomers to achieve high process efficiency but allow it to easily control the fine-structure characteristics of the copolymer, thereby providing an olefin-diene copolymer having desired properties with ease.Type: GrantFiled: April 12, 2011Date of Patent: December 23, 2014Assignee: Lotte Chemical CorporationInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Hwa-Kyu Kim, Jae-Young Park, Seung-Woong Yoon
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Patent number: 8889581Abstract: The present invention relates to a catalyst composition comprising a novel transition metal compound and a preparation method for polyolefin using the same. The catalyst composition of the present invention has high catalytic activity for polymerization of olefin-based monomers and enables it to control the fine-structure characteristics of the polyolefin, such as molecular weight distribution, in a wide range, thereby easily providing a polyolefin with desired properties.Type: GrantFiled: April 12, 2011Date of Patent: November 18, 2014Assignee: Lotte Chemical CorporationInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Young-Kook Kim, In-Sung Nam, Seung-Woong Yoon
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Patent number: 8889804Abstract: The present invention relates to a preparation method for polypropylene that comprises polymerizing a propylene monomer in the presence of a catalyst comprising a novel transition metal compound. Using the novel transition metal compound as a catalyst, the preparation method for polypropylene according to the present invention can not only acquire high catalytic activity for polymerization to achieve high efficiency of the process but allow it to easily control the fine-structure characteristics of the polymer, thereby providing polypropylene having desired properties with ease.Type: GrantFiled: April 12, 2011Date of Patent: November 18, 2014Assignee: Lotte Chemical CorporationInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Hwa-Kyu Kim, Jae-Young Park, Seung-Woong Yoon
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Publication number: 20130211020Abstract: The present invention relates to a catalyst composition comprising a novel transition metal compound and a preparation method for polyolefin using the same. The catalyst composition of the present invention has high catalytic activity for polymerization of olefin-based monomers and enables it to control the fine-structure characteristics of the polyolefin, such as molecular weight distribution, in a wide range, thereby easily providing a polyolefin with desired properties.Type: ApplicationFiled: April 12, 2011Publication date: August 15, 2013Applicant: LOTTE CHEMICAL CORPORATIONInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Young-Kook Kim, In-Sung Nam, Seung-Woong Yoon
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Publication number: 20130211021Abstract: The present invention relates to a preparation method for polypropylene that comprises polymerizing a propylene monomer in the presence of a catalyst comprising a novel transition metal compound. Using the novel transition metal compound as a catalyst, the preparation method for polypropylene according to the present invention can not only acquire high catalytic activity for polymerization to achieve high efficiency of the process but allow it to easily control the fine-structure characteristics of the polymer, thereby providing polypropylene having desired properties with ease.Type: ApplicationFiled: April 12, 2011Publication date: August 15, 2013Applicant: LOTTE CHEMICAL CORPORATIONInventors: Bun-Yeoul Lee, Ji-Hae Park, Seung-Hyun Do, Hwa-Kyu Kim, Jae-Young Park, Seung-Woong Yoon