Patents by Inventor Kwang Soo Yoon
Kwang Soo 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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Publication number: 20240165589Abstract: Disclosed herein is a catalyst for an upgrading reaction of biomass pyrolysis oil, a method for preparing the same, and a method for upgrading biomass pyrolysis oil using the same. The catalyst is a composite inorganic oxide, and the composite inorganic oxide includes lanthanum, nickel, titanium, and cerium. When a metal catalyst supported on carbon is used as a catalyst for a first step reaction, by using the catalyst as a catalyst for a second step reaction, the efficiency of the upgrading reaction of bio-oil is increased and a continuous reaction is possible without clogging of a continuous reactor.Type: ApplicationFiled: December 27, 2022Publication date: May 23, 2024Inventors: Chunjae YOO, Jeong-Myeong HA, Dong Jin SUH, Jae Wook CHOI, Young Hyun YOON, Kyeongsu KIM, Chang Soo KIM, Kwang Ho KIM, Thi Lien DO, Jong Hyun LEE, Jin A EUN
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Patent number: 11948947Abstract: A display device includes pixel circuits disposed in a display area and a driving circuit disposed in the peripheral area. The driving circuit includes a first transistor and each pixel circuit includes a second transistor. The first transistor includes a first active pattern disposed on the substrate, a first gate insulation layer having a first outer portion disposed on the first active pattern, and a first gate electrode disposed on the first gate insulation layer. The second transistor includes a second active pattern disposed on the substrate, a second gate insulation layer having a second outer portion disposed on the second active pattern, and a second gate electrode disposed on the second gate insulation layer. The first outer portion doesn't overlap the first gate electrode and has a first width. The second outer portion doesn't overlap the second gate electrode and has a second width smaller than the first width.Type: GrantFiled: June 9, 2020Date of Patent: April 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kwang Soo Lee, Hyun Kim, Kap Soo Yoon, Su Jung Jung
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Patent number: 11944958Abstract: Disclosed herein are a catalyst for hydrocracking reaction of high molecular weight components in bio-oil, a method for preparing the same and a method for bio-oil upgrading using the same. The catalyst includes a zeolite carrier; and at least one metal selected from the group consisting of nickel (Ni), ruthenium (Ru) and cerium (Ce) supported on the carrier. The catalyst promotes the hydrocracking of high molecular weight compounds contained in the bio-oil, but also inhibits the polymerization reaction of the decomposed product, thereby more effectively enhancing the hydrocracking reaction of the bio-oil.Type: GrantFiled: July 18, 2022Date of Patent: April 2, 2024Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Chunjae Yoo, Jeong-Myeong Ha, Dong Jin Suh, Jae Wook Choi, Young Hyun Yoon, Kyeongsu Kim, Chang Soo Kim, Kwang Ho Kim, Thi Lien Do
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Publication number: 20120026126Abstract: Disclosed herein is a capacitive touch screen, including: a base member; a plurality of electrode patterns formed on one surface of the base member and made of a conductive polymer; and electrode wirings connected to the electrode patterns and sensing a change in capacitance, wherein a color of the base member corresponds to a unique color of the conductive polymer.Type: ApplicationFiled: October 26, 2010Publication date: February 2, 2012Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Ho Joon Park, Kwang Soo Yoon, Jong Young Lee
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Patent number: 6525109Abstract: The present invention relates to a process of preparing polycarbonate, more specifically to a process of preparing polycarbonates by solid state polymerization using microwave radiation, which comprises steps of preparing polycarbonate prepolymer having a certain range of viscosity average molecular weight; converting said polycarbonate prepolymer into crystalline particles having a certain degree of crystallinity; and producing polycarbonates by solid state polymerization of said crystalline particles by applying microwave radiation, thus resulting in production of high quality polycarbonates with high molecular weight within short time.Type: GrantFiled: July 13, 2001Date of Patent: February 25, 2003Assignees: Korea Research Institute of Chemical Technology, S-Oil CorporationInventors: Kil-Yeong Choi, Jae Heung Lee, Young Chan Ko, Il Seok Choi, Cheol-Hyun Kim, Kwang Soo Yoon, Kyong Soon Lee
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Patent number: 6423812Abstract: The present invention relates to a process of preparing polycarbonates and more particularly, to the process of preparing polycarbonates through a melt polymerization reaction of dihydroxyaryl compounds with diarylcarbonate, wherein said melt polymerization is performed in the presence of a mixed catalyst composed of an oxygen (O) or sulfur (S) containing compound having lone-pair electrons and an alkali metal or alkaline earth metal salt in an appropriate ratio at a reduced temperature by accelerating a reaction rate to obtain high quality polycarbonates with higher than 15,000 g/mole of a viscosity average molecular weight and improved color.Type: GrantFiled: July 11, 2001Date of Patent: July 23, 2002Assignees: Korea Research Institute of Chemical Technology, S-Oil CorporationInventors: Young Chan Ko, Il Seok Choi, Cheol-Hyun Kim, Kwang Soo Yoon, Seung-Joo Kim, Kil-Yeong Choi, Jae Heung Lee, Kyong Soon Lee
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Publication number: 20020022675Abstract: The present invention relates to a process of preparing polycarbonates, more specifically to a process of preparing polycarbonates by solid state polymerization using microwave radiation, which comprises steps of preparing polycarbonate prepolymer having a certain range of viscosity average molecular weight; converting said polycarbonate prepolymer into crystalline particles having a certain degree of crystallinity; and producing polycarbonates by solid state polymerization of said crystalline particles by applying microwave radiation, thus resulting in production of high quality polycarbonates with high molecular weight within short time.Type: ApplicationFiled: July 13, 2001Publication date: February 21, 2002Applicant: Korea Research Institute of Chemical Technology and S-Oil CorporationInventors: Kil-Yeong Choi, Jae Heung Lee, Young Chan Ko, II Seok Choi, Cheol-Hyun Kim, Kwang Soo Yoon, Kyong Soon Lee
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Publication number: 20020022711Abstract: The present invention relates to a process of preparing polycarbonates and more particularly, to the process of preparing polycarbonates through a melt polymerization reaction of dihydroxyaryl compounds with diarylcarbonate, wherein said melt polymerization is performed in the presence of a mixed catalyst composed of an oxygen (O) or sulfur (S) containing compound having lone-pair electrons and an alkali metal or alkaline earth metal salt in an appropriate ratio at a reduced temperature by accelerating a reaction rate to obtain high quality polycarbonates with higher than 15,000 g/mole of a viscosity average molecular weight and improved color.Type: ApplicationFiled: July 11, 2001Publication date: February 21, 2002Applicant: Korea Research Institute of Chemical TechnologyInventors: Young Chan Ko, Il Seok Choi, Cheol-Hyun Kim, Kwang Soo Yoon, Seung-Joo Kim, Kil-Yeong Choi, Jae Heung Lee, Kyong Soon Lee
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Patent number: 6232432Abstract: The present invention relates to a process for the preparation of polycarbonates, more specifically to a process for the preparation of polycarbonates by a solid polymerization of prepolymers obtained by the polymerization between aromatic dihydroxides and diarylcarbonates, which comprises: a) preparing said prepolymer having a viscosity average molecular weight of 4,000-18,000 g/mole; b) preparing a microporous foam by injecting high-pressure inert gas; and c) preparing polycarbonates by a solid polymerization, which facilitates the removal of phenol, a by-product, and enhances molecular weight of polycarbonates without using any catalyst due to the relatively high polymerization rate.Type: GrantFiled: June 29, 2000Date of Patent: May 15, 2001Assignee: Korea Research Institute of Chemical Technology and S-Oil CorporationInventors: Kil-Yeong Choi, Jae Heung Lee, Sung-Goo Lee, Sang Hyun Park, Young Chan Ko, Il Seok Choi, Kwang Soo Yoon