Patents Assigned to Sukgyung AT Co., Ltd.
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Publication number: 20220206404Abstract: The present invention provides an external additive for toner, selected from the group consisting of tin oxide fine particles, complex tin oxide fine particles, and a mixture of the same fine particles, wherein the fine particles are (?) charged fine particles having an energy band gap of 3.2 to 3.6 eV, an electronegativity value (?) of 15 to 18, and a Blow-Off charge amount (uC/g) of ?100 to ?150. The external additive for toner of the present invention can: replace nano-sized titanium dioxide which has been conventionally used as an external additive for toner; guarantee general consumers using image devices as well as workers in the image industry safety from the harmful influences that may be generated upon exposure to the nano-sized titanium dioxide detached from the surface of a toner in use; and be safe for the human body.Type: ApplicationFiled: April 16, 2020Publication date: June 30, 2022Applicant: SUKGYUNG AT CO., LTD.Inventors: Hyung Jun LIM, Young Chul YOU, O Sung KWON, Jin Seop KIM, Sang Gon KIM, Eun Young SONG, So Yeon LEE, Yong Gu YOO, Hyeon Seok CHOI
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Patent number: 11338560Abstract: Provided is a functional fabric including a base fabric layer; and an insulation flexible sheet attached to at least one surface of the base fabric layer. The insulation flexible sheet includes a first flexible base; and an insulation coating layer attached to at least one surface of the base. The insulation flexible sheet may additionally include a second flexible base on the insulation coating layer. Accordingly, the functional fabric may have effective insulation properties by using silica particles having pores in a small amount used, and may have excellent strength due to the strength of the silica particles. In addition, Manufacturing methods of an insulation flexible sheet and a functional fabric are provided.Type: GrantFiled: July 23, 2015Date of Patent: May 24, 2022Assignee: SUKGYUNG AT CO., LTD.Inventors: Hyung Sup Lim, Young Cheol Yoo, O Sung Kwon
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Patent number: 10221295Abstract: Block for use in a CAD/CAM system for the manufacture of a dental restauration, said block consisting of a thermoplastic polymer comprising PEEK including radiopaque particles selected from the group comprising BaZrO3, YbF3, Yb2O3, SrO, SrZrO3, SiO2—ZrO2, SiO2—Yb2O3, Lu2O3, LuF3.Type: GrantFiled: April 7, 2016Date of Patent: March 5, 2019Assignees: SOCIETE DE RECHERCHES TECHNIQUES DENTAIRES—RTD, SUKGYUNG AT CO., LTDInventors: Pierre-Luc Reynaud, Manh-Quynh Chu, Hyung Sup Lim, Hyung Jun Lim, Young Cheol Yoo
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Publication number: 20170073237Abstract: Provided are hollow silica particles that have a refractive index of 1.2-1.4, a thermal conductivity of less than 0.1 W/m·K, an oil absorption rate of 0.1 ml/g or below, a porosity of at least 90% when mixed with a resin, and a particle distribution coefficient of variation (CV value) of 10% or below. Further provided are a composition comprising the hollow silica particles, and a transparent thermal insulation sheet which has a visible light transmittance of at least 70%, a thermal conductivity of less than 0.1 W/m·K, and a filling rate of particles of 30-80%.Type: ApplicationFiled: April 23, 2015Publication date: March 16, 2017Applicant: SUKGYUNG AT CO., LTD .Inventors: Hyung Sup LIM, Young Cheol YOO, O Sung KWON, Eun Young SONG
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Patent number: 8431627Abstract: The present invention provides a composition for crown material including resin and a fine spherized composite glass powder. The fine composite glass powder of the present invention for such a configuration has superior qualities with regard to both sintering and optical characteristics, and can be used as a filler for crown material.Type: GrantFiled: August 14, 2009Date of Patent: April 30, 2013Assignee: Sukgyung AT Co., Ltd.Inventors: Hyung Sup Lim, Hyung Joon Lim, Young Cheol Yoo, Sang Heon Kang, Jeong Won Seo
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Publication number: 20120237866Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.Type: ApplicationFiled: March 30, 2012Publication date: September 20, 2012Applicant: SUKGYUNG AT CO., LTD.Inventors: Hyung Sup Lim, Hyung Joon Lim, Young Cheol Yoo, Osung Kwon
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Patent number: 8178073Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.Type: GrantFiled: September 4, 2009Date of Patent: May 15, 2012Assignee: Sukgyung AT Co., Ltd.Inventors: Hyung Sup Lim, Hyung Joon Lim, Young Cheol Yoo, Osung Kwon
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Publication number: 20110264080Abstract: A medical device, such as a catheter, exhibiting high radiopaque properties as well as optical transparency is disclosed. Further, radiopaque materials and process conditions to produce such a material as well as a medical device, such as a catheter, exhibiting high radiopaque and optically transparent properties are also disclosed.Type: ApplicationFiled: April 25, 2011Publication date: October 27, 2011Applicant: Sukgyung AT Co., Ltd.Inventors: Hyung Sup Lim, Young Cheol Yoo, O Sung Kwon, Sang Min Kim, Gyung Man Kim
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Publication number: 20110189605Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.Type: ApplicationFiled: September 4, 2009Publication date: August 4, 2011Applicant: Sukgyung AT Co., Ltd.Inventors: Hyung Sup Lim, Hyung Joon Lim, Young Cheol Yoo, Osung Kwon
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Publication number: 20100297545Abstract: The present invention provides a preparation method of composite silica microparticles with monodispersity, comprising the steps of: (a) adding at least one precursor selected from a titania precursor and an alumina precursor, and a silica precursor to a solvent, which are hydrolyzed to form composite silica microparticles; (b) drying and calcining the composite silica microparticles; and (c) hydrophobically treating the calcined composite silica microparticles.Type: ApplicationFiled: April 26, 2010Publication date: November 25, 2010Applicant: Sukgyung AT Co., Ltd.Inventors: Young Cheol Yoo, Jong Gil Shim, Byeong Ok Jo, O Sung Kwon
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Publication number: 20100183689Abstract: The present invention relates to a method of manufacturing titania nanoparticles, and specifically to a method of manufacturing titania nanoparticles wherein the particle size is uniform, it is possible to manufacture monodisperse particles without aggregation among particles, a uniform coating can be applied, that is suitable to large-scale production, and that can obtain high-resolution images by maintaining the toner electric charge and electric charge distribution; and the developer included in said titania nanoparticles.Type: ApplicationFiled: March 30, 2010Publication date: July 22, 2010Applicant: Sukgyung AT Co., Ltd.Inventor: Hyung Sup Lim