Patents by Inventor Sung Joon Oh
Sung Joon Oh 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: 20240108001Abstract: An antibacterial composition according to an exemplary embodiment of the present technology comprises one or more compounds comprising a quaternary ammonium structure having an acrylate group or a methacrylate group, in which a critical micelle concentration of the compound comprising the quaternary ammonium structure is 0.1 wt % to 3 wt %.Type: ApplicationFiled: July 13, 2022Publication date: April 4, 2024Applicant: LG Chem, Ltd.Inventors: Yeonjoo Kang, Ji Seok Lee, Soonhee Kang, Sung Joon Oh
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Publication number: 20240026041Abstract: Provided are a polyethylene having excellent processability and capable of reducing an injection molding defect rate, and a method of preparing the same. The polyethylene has an integral value in the region where the Log Mw is 5.5 or more in a GPC curve, wherein the x-axis is log Mw and the y-axis is dw/dlogMw, of 9% or less of the total integral value: and has a ratio (Tc10/Tc40) of a crystallization temperature (Tc10) measured at a cooling rate of 10° C./min to a crystallization temperature (Tc40) measured at a cooling rate of 40° C./min of less than 1.04.Type: ApplicationFiled: November 29, 2021Publication date: January 25, 2024Applicant: LG Chem, Ltd.Inventors: Yeonji Choe, Jongchan Lee, Jeongkyu Lee, Christine Jisoo Song, Hee Su Oh, Jiwon Yoon, Yi Young Choi, Sung Joon Oh
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Patent number: 11817564Abstract: The present invention relates to an active material analysis apparatus for analyzing an active material of a battery. An active material analysis apparatus of the present invention may comprise: a lower plate at which an electrode is located; an upper plate which is coupled to the lower plate with the electrode disposed therebetween; a sealing member positioned at a joint part between the upper plate and the lower plate; and a coupling member for coupling the upper plate and the lower plate, wherein: the upper plate includes an opening provided to allow a light source to be radiated to the electrode; an electrolyte is filled in a space between the upper plate and the lower plate; the opening is covered by glass; and the upper plate faces a liquid surface formed by the electrolyte and is positioned at a position higher than that of the liquid surface.Type: GrantFiled: September 18, 2019Date of Patent: November 14, 2023Inventors: Yeon Wook Jung, Sung Joon Oh
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Publication number: 20230183418Abstract: A biopolymer, which exists in a liquid phase at room temperature, a use thereof, and a preparation method therefor are provided.Type: ApplicationFiled: March 9, 2017Publication date: June 15, 2023Inventors: Jae Hyung KIM, Dong Gyun KANG, Chul Woong KIM, Young Hyun CHO, Sung Joon OH, Jeong Kyu LEE, In Young HUH
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Publication number: 20230178734Abstract: The present disclosure relates to a negative electrode for a secondary battery that is improved in the peeling resistance and adhesiveness of the active material layer and thus can improve the life characteristics of the negative electrode and the lithium secondary battery, a method of manufacturing the same and a lithium secondary battery including same. The negative electrode for a secondary battery includes a metal current collector; and an active material layer formed on the metal current collector and containing a negative electrode active material, a binder, and a conductive material, wherein the active material layer has an average value of shear strength of 1.6 MPa or more as measured at a predetermined depth.Type: ApplicationFiled: February 21, 2022Publication date: June 8, 2023Applicant: LG Chem, Ltd.Inventors: Hyunwoo Choi, Sung Joon Oh, Youngsuk Kim, Jeongkyu Lee, Inyoung Song, Yeonji Choe
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Patent number: 11552288Abstract: A method for quantitatively analyzing cohesive failure of an electrode analyzes cohesive failure of an electrode and includes preparing an electrode in which an electrode material mixture layer including an electrode active material, a conductive agent, and a binder is formed on a current collector, measuring shear strength (?) data according to a cutting depth while cutting the electrode material mixture layer from a surface thereof until reaching the current collector using a surface and interfacial cutting analysis system (SAICAS), obtaining a regression curve of shear strength according to the cutting depth from the shear strength (?) data, and determining a cutting depth, at which the shear strength is minimum in the regression curve, as a location of cohesive failure.Type: GrantFiled: August 18, 2020Date of Patent: January 10, 2023Assignee: LG ENERGY SOLUTION, LTD.Inventors: In Young Song, Joo Yul Baek, Jeong Kyu Lee, Sung Joon Oh, Jong Chan Lee
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Patent number: 11542351Abstract: The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm3 to 0.930 g/cm3 measured according to ASTM D1505; and satisfies the following requirements (provided that S1+S2+S3=1), when measuring the relative content of peak area according to melting temperature (Tm) using SSA (Successive Self-nucleation and Annealing) analysis: the content(S1) of peak area at Tm less than 100° C. is 0.33 to 0.35; the content(S2) of peak area at Tm of 100° C. or more and 120° C. or less is 0.52 to 0.56; and the content(S3) of peak area at Tm greater than 120° C. is 0.10 to 0.14.Type: GrantFiled: December 20, 2019Date of Patent: January 3, 2023Inventors: Jeongkyu Lee, Sung Min Lee, Hyojoon Lee, Chang Hwan Jang, Sung Ho Park, Seul Ki Im, Jinyoung Lee, Sung Joon Oh, Seyoung Kim, Jisoo Song
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Patent number: 11535957Abstract: The present invention relates to a method for producing a polyacrylonitrile-based fiber, wherein the method polymerizes a monomer mixture including an acrylonitrile-based monomer, a carboxylic acid-based comonomer, and an acrylate-based comonomer, wherein the acrylate-based comonomer includes the steps of producing a polyacrylonitrile-based copolymer so as to be included in an amount of 4 to 20 parts by weight based on 100 parts by weight of the monomer mixture, fiberizing the polyacrylonitrile-based copolymer, oxidizing and stabilizing the fiberized polyacrylonitrile-based copolymer, which may control the oxidation stabilization reaction, particularly the cyclization reaction. Accordingly, the energy consumption of the oxidation stabilization reaction may be reduced, economical efficiency of the production of polyacrylonitrile-based fiber may be obtained, and the physical and mechanical properties of the carbon fiber may be improved.Type: GrantFiled: November 22, 2017Date of Patent: December 27, 2022Assignee: LG CHEM, LTD.Inventors: Jeong Kyu Lee, Chang Hun Kim, In Young Song, Jeong Hun Cho, Jong Soo Do, Sung Joon Oh, Joon Hee Cho
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Patent number: 11505624Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.Type: GrantFiled: September 20, 2018Date of Patent: November 22, 2022Inventors: Jin Sook Ryu, Kyoung Hwan Oh, Woo Jin Cho, Suk Youn Kang, Sung Joon Oh, Sun Ok Oh
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Publication number: 20220244235Abstract: Provided is a method of analyzing a copolycarbonate. More particularly, provided is a method of analyzing a copolycarbonate, in which a polysiloxane structure is introduced into the main chain of a polycarbonate, the method capable of more accurately analyzing a weight average molecular weight, a number average molecular weight, and a molecular weight distribution of a polysiloxane-containing aromatic diol compound which is used as a starting material.Type: ApplicationFiled: June 19, 2020Publication date: August 4, 2022Inventors: Hyo Yong KIM, Jin Sook RYU, Sunok OH, Sung Joon OH
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Publication number: 20210332169Abstract: The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm3 to 0.930 g/cm3 measured according to ASTM D1505; and satisfies the following requirements (provided that S1+S2+S3=1), when measuring the relative content of peak area according to melting temperature (Tm) using SSA (Successive Self-nucleation and Annealing) analysis: the content(S1) of peak area at Tm less than 100° C. is 0.33 to 0.35; the content(S2) of peak area at Tm of 100° C. or more and 120° C. or less is 0.52 to 0.56; and the content(S3) of peak area at Tm greater than 120° C. is 0.10 to 0.14.Type: ApplicationFiled: December 20, 2019Publication date: October 28, 2021Applicant: LG Chem, Ltd.Inventors: Jeongkyu Lee, Sung Min Lee, Hyojoon Lee, Chang Hwan Jang, Sung Ho Park, Seul Ki Im, Jinyoung Lee, Sung Joon Oh, Seyoung Kim, Jisoo Song
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Publication number: 20210328273Abstract: The present invention relates to an active material analysis apparatus for analyzing an active material of a battery. An active material analysis apparatus of the present invention may comprise: a lower plate at which an electrode is located; an upper plate which is coupled to the lower plate with the electrode disposed therebetween; a sealing member positioned at a joint part between the upper plate and the lower plate; and a coupling member for coupling the upper plate and the lower plate, wherein: the upper plate includes an opening provided to allow a light source to be radiated to the electrode; an electrolyte is filled in a space between the upper plate and the lower plate; the opening is covered by glass; and the upper plate faces a liquid surface formed by the electrolyte and is positioned at a position higher than that of the liquid surface.Type: ApplicationFiled: September 18, 2019Publication date: October 21, 2021Applicant: LG Chem, Ltd.Inventors: Yeon Wook Jung, Sung Joon Oh
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Patent number: 10989655Abstract: The present invention relates to a method for characterizing a polyacrylonitrile-based fiber, the method having a reduced error. In a spectroscopic analysis method for a polyacrylonitrile-based fiber according to the present invention, a contact degree between an inspection target and an attenuated total reflection crystal is predicted through Equation 2 and is applied to Equation 1 to correct a spectrum peak height, and thus, the peak height of the infrared spectroscopy spectrum may be measured with repeatability.Type: GrantFiled: December 20, 2018Date of Patent: April 27, 2021Assignee: LG CHEM, LTD.Inventors: Jong Soo Do, Sung Joon Oh
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Patent number: 10983252Abstract: Disclosed herein is an anti-reflective film including: a hard coating layer; and a low-refractive layer containing a binder resin, and hollow inorganic nanoparticles and solid inorganic nanoparticles which are dispersed in the binder resin, wherein the low-refractive layer includes a first layer containing at least 70 vol % of the entire solid inorganic nanoparticles and a second layer containing at least 70 vol % of the entire hollow inorganic nanoparticles, and at the time of fitting polarization ellipticity measured by ellipsometry for the first layer or/and the second layer included in the low-refractive layer using a Cauchy model represented by the following General Equation 1, the second layer satisfies a predetermined condition.Type: GrantFiled: January 3, 2019Date of Patent: April 20, 2021Assignee: LG CHEM, LTD.Inventors: In Young Song, Jin Seok Byun, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang, Sung Joon Oh
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Publication number: 20210057728Abstract: A method for quantitatively analyzing cohesive failure of an electrode analyzes cohesive failure of an electrode and includes preparing an electrode in which an electrode material mixture layer including an electrode active material, a conductive agent, and a binder is formed on a current collector, measuring shear strength (?) data according to a cutting depth while cutting the electrode material mixture layer from a surface thereof until reaching the current collector using a surface and interfacial cutting analysis system (SAICAS), obtaining a regression curve of shear strength according to the cutting depth from the shear strength (?) data, and determining a cutting depth, at which the shear strength is minimum in the regression curve, as a location of cohesive failure.Type: ApplicationFiled: August 18, 2020Publication date: February 25, 2021Applicant: LG CHEM, LTD.Inventors: In Young SONG, Joo Yul BAEK, Jeong Kyu LEE, Sung Joon OH, Jong Chan LEE
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Publication number: 20210057719Abstract: An electrode for a secondary battery including a current collector, and at least one electrode material mixture layer on a surface of the current collector, the electrode material mixture layer including a negative electrode active material, a conductive agent, and a binder wherein, the electrode has a property such that in a regression curve obtained by regression analysis of shear strength data according to a cutting depth which are measured while obliquely cutting the electrode material mixture layer from a surface thereof until reaching the current collector using a surface and interfacial cutting analysis system (SAICAS), a ratio of a maximum value (?max) to a minimum value (?min) of shear strength is 1.7 or less.Type: ApplicationFiled: August 18, 2020Publication date: February 25, 2021Applicant: LG CHEM, LTD.Inventors: In Young SONG, Joo Yul BAEK, Jeong Kyu LEE, Sung Joon OH, Jong Chan LEE
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Publication number: 20200393370Abstract: The present invention relates to a method for characterizing a polyacrylonitrile-based fiber, the method having a reduced error. In a spectroscopic analysis method for a polyacrylonitrile-based fiber according to the present invention, a contact degree between an inspection target and an attenuated total reflection crystal is predicted through Equation 2 and is applied to Equation 1 to correct a spectrum peak height, and thus, the peak height of the infrared spectroscopy spectrum may be measured with repeatability.Type: ApplicationFiled: December 20, 2018Publication date: December 17, 2020Inventors: Jong Soo DO, Sung Joon OH
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Patent number: 10858465Abstract: The present invention relates to an ethylene/alpha-olefin copolymer and, more particularly, to an ethylene/alpha-olefin copolymer that exhibits excellent environmental stress crack resistance by appropriately controlling the ratio of crystal structure domain and amorphous domain, and the like. The ethylene/alpha-olefin copolymer comprises an ethylene repeating unit and an alpha-olefin repeating unit, and has a crystal structure including a crystalline domain containing lamellar crystals and an amorphous domain containing a tie molecule that mediates bonding between the lamellar crystals. The lamellar crystal thickness (dc) of the ethylene/alpha-olefin copolymer as calculated from the result of Small Angle X-ray Scattering (SAXS) analysis is between 12.0 and 16.0 nm, the amorphous domain thickness (da) is between 4.0 and 5.3 nm, and the thickness ratio da/dc is between 0.3 and 0.4.Type: GrantFiled: October 25, 2017Date of Patent: December 8, 2020Assignee: LG CHEM, LTD.Inventors: Jeong Kyu Lee, Pum Suk Park, In Young Song, Sung Joon Oh, Yi Young Choi, Soon Ho Sun
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Publication number: 20200377625Abstract: The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a modified conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation of the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60° C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.Type: ApplicationFiled: September 20, 2018Publication date: December 3, 2020Applicant: LG Chem, Ltd.Inventors: Jin Sook RYU, Kyoung Hwan OH, Woo Jin CHO, Suk Youn KANG, Sung Joon OH, Sun Ok OH
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Patent number: 10802178Abstract: Disclosed herein is an anti-reflective film including: a hard coating layer; and a low-refractive layer containing a binder resin, and hollow inorganic nanoparticles and solid inorganic nanoparticles which are dispersed in the binder resin, wherein the low-refractive layer includes a first layer containing at least 70 vol % of the entire solid inorganic nanoparticles and a second layer containing at least 70 vol % of the entire hollow inorganic nanoparticles, and at the time of fitting polarization ellipticity measured by ellipsometry for the first layer or/and the second layer included in the low-refractive layer using a Cauchy model represented by the following General Equation 1, the second layer satisfies a predetermined condition.Type: GrantFiled: January 3, 2019Date of Patent: October 13, 2020Assignee: LG CHEM, LTD.Inventors: In Young Song, Jin Seok Byun, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang, Sung Joon Oh