Patents by Inventor Keon Il Kim
Keon Il Kim 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: 20240093682Abstract: Provided is a diaphragm pump. The diaphragm pump operates such that a viscous liquid is discharged by transferring a pressing force via a diaphragm that is elastically deformed. The diaphragm pump has a structure capable of rapidly and accurately discharging the viscous liquid of high viscosity by using a diaphragm. Also, the diaphragm pump is capable of effectively pressing the viscous liquid while preventing the damage to the particles contained in the viscous liquid, by preventing the mechanical structure pressing the viscous liquid from coming into direct contact with the viscous liquid.Type: ApplicationFiled: September 19, 2023Publication date: March 21, 2024Applicant: PROTEC CO., LTD.Inventors: Keon Hee KIM, Sung Il PARK
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Publication number: 20140091255Abstract: A method of preparing an electrode active material for manufacturing a lithium secondary battery exhibiting stable charging/discharging efficiency and life-cycle characteristics even during high-speed charging/discharging cycles is provided. Also, a method of controlling both a composition ratio (Ti/Li) of surface elements and a composition of a lithium element in a lithium titanium oxide which is known to be an electrode active material having a relatively stable structure is provided. The lithium secondary battery using the lithium titanium oxide manufactured by the method as the electrode active material can be stably used by maintaining charging/discharging efficiency and charging capacity even during the high-speed charging/discharging cycles.Type: ApplicationFiled: April 18, 2012Publication date: April 3, 2014Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Chun Joong Kim, Seon Ju Choi, Soo Chan Kim, Dong Gyu Chang, Keon Il Kim, Woo Young Yang
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Patent number: 8603717Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: GrantFiled: July 22, 2009Date of Patent: December 10, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8492060Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: GrantFiled: June 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8475995Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: GrantFiled: October 22, 2008Date of Patent: July 2, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8389188Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.Type: GrantFiled: October 22, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dong Won Kim, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Duck Kyun Ahn
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Patent number: 8389196Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: GrantFiled: September 19, 2008Date of Patent: March 5, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Patent number: 8206884Abstract: A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.Type: GrantFiled: February 20, 2008Date of Patent: June 26, 2012Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Jae Bum Park, Il Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110159424Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: ApplicationFiled: June 4, 2009Publication date: June 30, 2011Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20110116841Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.Type: ApplicationFiled: July 22, 2009Publication date: May 19, 2011Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Jae Bum Park, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100232837Abstract: A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.Type: ApplicationFiled: October 22, 2008Publication date: September 16, 2010Applicant: SAMSUNG FINE CHEMICALS CO., LTDInventors: Dae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100216069Abstract: Provided is a method of preparing a toner, the method including: preparing a solvent emulsion by stirring a medium including a polar medium, an organic solvent, and a surfactant; adding toner components including a resin and a pigment to the solvent emulsion; removing the organic solvent from the solvent emulsion including the toner components; and collecting a toner particle from the solvent emulsion from which the organic solvent is removed.Type: ApplicationFiled: September 19, 2008Publication date: August 26, 2010Applicant: Samsung Fine Chemicals Co. LTdInventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20100098462Abstract: A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a micro-suspension by adding the prepared mixture to a dispersion medium; and forming a toner composition by removing the organic solvent from the prepared micro-suspension. Therefore, the method of preparing a toner using the disclosed micro-suspension particle and a toner prepared using the same can save manufacturing costs, and can improve charging ability and cleaning properties of the toner.Type: ApplicationFiled: February 20, 2008Publication date: April 22, 2010Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Woo Young Yang, Keon Il Kim, Dae Il Hwang, Jae Bum Park, Il Sun Hwang, Jun Hee Lee, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Patent number: 7510748Abstract: Disclosed is a broadband reflection type brightness enhancement polarizer, which includes a cholesteric liquid crystal film laminate having a broadband selective reflecting wavelength range in which a plurality of cholesteric liquid crystal films having selective reflecting wavelength ranges different from each other by having different mixture ratios of a curable nematic liquid crystal compound expressed by the chemical formula 1 and a curable chiral compound expressed by the chemical formula 2 are laminated; and a film having ¼? phase difference laminated on one surface of the cholesteric liquid crystal film laminate. This polarizer has wide selective reflecting wavelength ranges of the cholesteric liquid crystal films composing the polarizer, so the entire visible ray range can be covered just by laminating several cholesteric liquid crystal films.Type: GrantFiled: March 7, 2006Date of Patent: March 31, 2009Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Sung-Tae Kim, Ki-Cheol Yoon, Keon-Il Kim, Nam Ki, Hunkyun Pak, Jea-Chul Jung
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Patent number: 7486376Abstract: The present invention relates to a method of manufacturing a reflective polarizing film for a liquid crystal display device in which cholesteric liquid crystal layers having different selective light-reflecting wavelengths are laminated in the laminated coating method, thus a forming liquid crystal film that covers a visible light region and ¼? retardation film are attached to the liquid crystal film. In this case, two or more cholestric liquid crystal layers having different selective light-reflecting wavelengths are laminated in order from the shorter wavelength to the longer wavelength in the laminated coating method. Further, during the lamination, orientation layers are laminated between the liquid crystal layers to maximize the selective reflection characteristic of the cholesteric liquid crystal.Type: GrantFiled: November 19, 2004Date of Patent: February 3, 2009Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Sung-Tae Kim, Keon-Il Kim
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Patent number: 7433002Abstract: The present invention is related to a method of method of manufacture of a reflective polarizing film that can improve brightness of a liquid crystal display device remarkably by making a liquid crystal film that can cover visible light by using cholesteric liquid crystal layers having different selective light-reflection central wavelengths, attaching a quarter wave (¼ ?) retardation film on top of the liquid crystal film, and adding prism patterns to the opposite side of the liquid crystal film. The reflective polarizing film of the present invention is characterized by that two or more cholesteric liquid crystal layers having different selective reflection wavelength regions are laminated in order from a shorter wavelength to a longer wavelength, and brightness of a liquid crystal display device is maximized owing to an integrated film manufactured by attaching a ¼ ? retardation film onto cholesteric liquid crystal layers and forming prism patterns onto the opposite side.Type: GrantFiled: March 25, 2005Date of Patent: October 7, 2008Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Sung-Tae Kim, Ki-Cheol Yoon, Keon-Il Kim, Jae-Chul Jung
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Patent number: 7179441Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.Type: GrantFiled: May 6, 2002Date of Patent: February 20, 2007Assignees: Samsung Fine Chemicals Co., Ltd., Samsung Electro-Mechanics Co., Ltd.Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Seon Cheol Park, Jai Joon Lee
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Publication number: 20060204681Abstract: Disclosed is a broadband reflection type brightness enhancement polarizer, which includes a cholesteric liquid crystal film laminate having a broadband selective reflecting wavelength range in which a plurality of cholesteric liquid crystal films having selective reflecting wavelength ranges different from each other by having different mixture ratios of a curable nematic liquid crystal compound expressed by the chemical formula 1 and a curable chiral compound expressed by the chemical formula 2 are laminated; and a film having ¼? phase difference laminated on one surface of the cholesteric liquid crystal film laminate. This polarizer has wide selective reflecting wavelength ranges of the cholesteric liquid crystal films composing the polarizer, so the entire visible ray range can be covered just by laminating several cholesteric liquid crystal films.Type: ApplicationFiled: March 7, 2006Publication date: September 14, 2006Applicant: Samsung Fine Chemicals Co., Ltd.Inventors: Keon-Il Kim, Sung-Tae Kim, Ki-Cheol Yoon, Nam Ki, Hunkyun Pak, Jae-Chul Jung
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Publication number: 20040253172Abstract: The present invention relates to a method for preparing barium titanate based powder. More particularly, the present invention provides a method for preparing barium titanate powder comprising the following steps of precipitation of barium titanyl oxalate (BaTiO(C2O4)2.4H2O) with spraying a mixture of an aqueous barium chloride (BaCl2.2H2O) and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid, via a nozzle; wet pulverization by using a beads mill after adding an additive such as an amine; dry; pyrolysis; and re-pulverization.Type: ApplicationFiled: August 16, 2004Publication date: December 16, 2004Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Seon Cheol Park, Jai Joon Lee
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Publication number: 20040115122Abstract: The present invention relates to a method for preparing high quality barium titanate powder by precipitating barium titanyl oxalate with spraying a mixture of an aqueous barium chloride and titanium tetrachloride (TiCl4) to an aqueous solution of oxalic acid via a nozzle in high speed, which exhibits improved yield with shortened reaction time and optimized stoichiometric mole ratio of barium to titanium, thus suitable materials for multilayer ceramic capacitors, PTC thermistors, resistors, and the like.Type: ApplicationFiled: February 5, 2004Publication date: June 17, 2004Inventors: Jae Chul Jung, Woo Young Yang, Keon Il Kim, Yun Jung Park, Jun Hee Lee, Kang Heon Hur, Jai Joon Lee