Patents by Inventor Hyeung-Jin Lee

Hyeung-Jin Lee 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).

  • Publication number: 20230357551
    Abstract: Proposed is a rubber process oil including a base oil, a liquid olefin copolymer prepared by copolymerization of ethylene with an alpha-olefin having 3 to 20 carbon atoms, polyisobutylene, and one or more additives selected from among alkylated phosphonium phosphate compounds and butylhydroxybenzene-based compounds. A rubber composition including the rubber process oil is also proposed.
    Type: Application
    Filed: March 31, 2023
    Publication date: November 9, 2023
    Applicant: DL Chemical CO., LTD.
    Inventors: Hyeung Jin LEE, Jin Hoon JU
  • Patent number: 11462802
    Abstract: The present disclosure relates to a composition for manufacturing a secondary battery separator having excellent electrical conductivity and capable of minimizing occurrence of black scum on an electrode and a secondary battery thereof. The composition for manufacturing a secondary battery separator according to the present disclosure includes a polyethylene resin and an ionic liquid lubricant composition. The ionic liquid lubricant composition includes a pore-controlling agent, an ionic liquid, and paraffinic oil.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: October 4, 2022
    Assignees: SK Innovation Co., Ltd., SK Lubricants Co., Ltd.
    Inventors: Hyeung-Jin Lee, Hwan-Kyu Jung, Hyo-Shin Kwak, Sang-Hye Shin
  • Patent number: 11261399
    Abstract: The present invention relates to a lubricant composition, and more particularly to a lubricant composition, which includes an ethylene-alphaolefin oligomer and an alkylated phosphonium compound, thus realizing energy reduction and an increased endurance life, and which is thus suitable for use in gear oil. The lubricant composition of the present invention includes a base oil, a liquid olefin copolymer, and an alkylated phosphonium compound.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: March 1, 2022
    Assignee: DL Chemical CO., LTD.
    Inventors: Hyeung Jin Lee, Kyong Ju Na
  • Patent number: 11111456
    Abstract: The present invention relates to a lubricant composition, and more particularly to a lubricant composition, which has superior oxidation stability and friction characteristics even under harsh conditions of high temperature and high pressure and is thus suitable for use in hydraulic oil. The lubricant composition of the present invention includes a base oil, a liquid olefin copolymer, a phosphorothioate compound, and phosphonium phosphate.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: September 7, 2021
    Assignee: DL Chemical CO., LTD.
    Inventors: Hyeung Jin Lee, Jin Hun Ju
  • Publication number: 20200277543
    Abstract: The present invention relates to a lubricant composition, and more particularly to a lubricant composition, which has superior oxidation stability and friction characteristics even under harsh conditions of high temperature and high pressure and is thus suitable for use in hydraulic oil. The lubricant composition of the present invention includes a base oil, a liquid olefin copolymer, a phosphorothioate compound, and phosphonium phosphate.
    Type: Application
    Filed: November 12, 2019
    Publication date: September 3, 2020
    Applicant: DAELIM INDUSTRIAL CO., LTD.
    Inventors: Hyeung Jin Lee, Jin Hun Ju
  • Publication number: 20200277540
    Abstract: The present invention relates to a lubricant composition, and more particularly to a lubricant composition, which includes an ethylene-alphaolefin oligomer and an alkylated phosphonium compound, thus realizing energy reduction and an increased endurance life, and which is thus suitable for use in gear oil. The lubricant composition of the present invention includes a base oil, a liquid olefin copolymer, and an alkylated phosphonium compound.
    Type: Application
    Filed: November 12, 2019
    Publication date: September 3, 2020
    Applicant: DAELIM INDUSTRIAL CO., LTD.
    Inventors: Hyeung Jin LEE, Kyong Ju NA
  • Publication number: 20190312248
    Abstract: The present disclosure relates to a composition for manufacturing a secondary battery separator having excellent electrical conductivity and capable of minimizing occurrence of black scum on an electrode and a secondary battery thereof. The composition for manufacturing a secondary battery separator according to the present disclosure includes a polyethylene resin and an ionic liquid lubricant composition. The ionic liquid lubricant composition includes a pore-controlling agent, an ionic liquid, and paraffinic oil.
    Type: Application
    Filed: December 12, 2017
    Publication date: October 10, 2019
    Inventors: Hyeung-Jin Lee, Hwan-Kyu Jung, Hyo-Shin Kwak, Sang-Hye Shin
  • Patent number: 9847469
    Abstract: Provided is a thermoelectric material satisfying (MX)1+a(TX2)n and having a superlattice structure, wherein M is at least one element selected from the group consisting of Group 13, Group 14, and Group 15, T is at least one element selected from Group 5, X is a chalcogenide element, a is a real number satisfying 0<a<1, and n is a natural number of 1 to 3.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: December 19, 2017
    Assignees: SK INNOVATION CO., LTD., UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Hyeung Jin Lee, Yong Rae Cho, Jong-Soo Rhyee, Yoo Jang Song, Jin Hee Kim
  • Patent number: 9419196
    Abstract: Provided is a thermoelectric material containing: a matrix containing a Group 13 element of chalcogenide; and oxide nanoparticles dispersed into the matrix to have excellent thermal stability, wherein the oxide nanoparticle forms a coherent interphase interface with the Group 13 element of the chalcogenide-based matrix and is elongated in a specific direction, such that thermal conductivity may be effectively decreased with a trace amount of the oxide nanoparticle to minimize deterioration of electric conductivity.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: August 16, 2016
    Assignee: SK Innovation Co., Ltd.
    Inventors: Hyeung Jin Lee, Jong Soo Rhyee
  • Publication number: 20160099396
    Abstract: Provided is a thermoelectric material satisfying (MX)1+a(TX2)n and having a superlattice structure, wherein M is at least one element selected from the group consisting of Group 13, Group 14, and Group 15, T is at least one element selected from Group 5, X is a chalcogenide element, a is a real number satisfying 0<a<1, and n is a natural number of 1 to 3.
    Type: Application
    Filed: March 25, 2014
    Publication date: April 7, 2016
    Inventors: Hyeung Jin LEE, Yong Rae CHO, Jong-Soo RHYEE, Yoo Jang SONG, Jin Hee KIM
  • Publication number: 20150020862
    Abstract: Provided is a thermoelectric material containing: a matrix containing a Group 13 element of chalcogenide; and oxide nanoparticles dispersed into the matrix to have excellent thermal stability, wherein the oxide nanoparticle forms a coherent interphase interface with the Group 13 element of the chalcogenide-based matrix and is elongated in a specific direction, such that thermal conductivity may be effectively decreased with a trace amount of the oxide nanoparticle to minimize deterioration of electric conductivity.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 22, 2015
    Inventors: Hyeung Jin Lee, Jong Soo Rhyee
  • Publication number: 20130005619
    Abstract: The present invention provides a lubricating oil composition for reducing a friction coefficient adjacent to the surface of being subjected to lubrication. In particular, the present invention provides nanoporous particles capable of being dispersed in a lubricating oil composition comprising base oil having a lubricant viscosity. Since the nanoporous particles having nano-sized, oil soluble pores according to the present invention reduces a friction coefficient, and in the long term, gradually releases an effective ingredient, the lubricating oil composition comprising the same of the present invention can act as a reducing agent for reducing friction for a long period of time, and thereby, exhibit excellent lubricant effects.
    Type: Application
    Filed: March 16, 2011
    Publication date: January 3, 2013
    Applicant: SK LUBRICANTS CO., LTD.
    Inventors: Hyeung Jin Lee, Yong Rae Cho
  • Patent number: 8092966
    Abstract: The invention relates to toner particles having excellent charging characteristics and transferring properties, a method for producing the same and toner including the same. More particularly, the invention relates to toner particles, a method for producing the same and toner including the same, in which a CCA highly compatible with a binder resin is readily dispersed in the binder resin, thereby improving charge-maintaining property and charge distribution, and the resultant mixture is sphered to realize excellent long term credibility and transfer property. The toner particles include a styrene/acrylate-based CCA; a styrene/acrylate-based binder resin; and a polyester-based binder resin.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: January 10, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jong-Eun Kim, Hyeung-Jin Lee, Bong-Hyun Jeong, Chang-Soon Lee
  • Publication number: 20100151373
    Abstract: The invention relates to toner particles having excellent charging characteristics and transferring properties, a method for producing the same and toner including the same. More particularly, the invention relates to toner particles, a method for producing the same and toner including the same, in which a CCA highly compatible with a binder resin is readily dispersed in the binder resin, thereby improving charge-maintaining property and charge distribution, and the resultant mixture is sphered to realize excellent long term credibility and transfer property. The toner particles include a styrene/acrylate-based CCA; a styrene/acrylate-based binder resin; and a polyester-based binder resin.
    Type: Application
    Filed: November 14, 2007
    Publication date: June 17, 2010
    Inventors: Jong-Eun Kim, Hyeung-Jin Lee, Bong-Hyun Jeong, Chang-Soon Lee
  • Publication number: 20090311618
    Abstract: Provided is a non-magnetic mono-component color toner with improved charge properties by surface modification with a charge control agent. The color toner is prepared by spheroidizing toner core particles including a binder and a colorant in the presence of 0.5 to 3 parts by weight of a charge control agent and coating the resultant spherical toner core particles with a first spherical organic powder with an average particle size of 50 to 120 nm, a second spherical organic powder with an average particle size of 600 to 1,000 nm, silica with an average particle size of 5 to 20 nm, and titanium dioxide with an average particle size of 300 to 1,000 nm. The color toner exhibits excellent surface charge properties (e.g., a narrow charge distribution, high chargeability, and good charge maintenance capability), thereby ensuring low image/background contamination, high transfer efficiency, good image density and long-term stability.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 17, 2009
    Inventors: Chang-Soon Lee, Hyeung-Jin Lee, Je-Sik Jung
  • Patent number: 7592114
    Abstract: The present invention relates to a color toner for a nonmagnetic mono-component printing system that improves the printing characteristics, and a preparation method thereof. More specifically, the present invention provides a color toner including a first coating layer and a second coating layer formed on a toner mother particle, wherein the first coating layer contains coated organic powders where two kinds of organic powders are coated with each other, and the second coating layer contains coated inorganic powders where silica and titanium dioxide are coated with each other. The color toner of the present invention has a narrow charge distribution, good image density, high transfer efficiency, excellent long-term stability, and reduced PCR contamination, thereby being good for use in high speed color printers, etc., employing a direct type or a tandem type of transfer system.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: September 22, 2009
    Assignee: LG Chem Ltd.
    Inventors: Hyeung-Jin Lee, Joo-Yong Park, Chang-Soon Lee
  • Publication number: 20090233206
    Abstract: There is provided a toner having narrow charge distribution, high chargeability and low image contamination, as well as excellent physical properties such as long-term stability, transfer property and image uniformity, by improving shapes of toner core particles and adding a suitable external additive to surfaces of the toner core particles. The toner includes spheroidized toner core particles; and an external additive coated onto surfaces of the toner core particles, wherein the external additive comprises organic powder, silica and spherical titanium dioxide powder. The toner may be useful to obtain a highly uniform and high-quality image even when the toner of the present invention is used for an extended time since the toner has high chargeability, excellent image uniformity in which charge uniformity and narrow charge distribution are maintained for a long time, low image contamination, as well as excellent physical properties such as transfer property and long-term stability.
    Type: Application
    Filed: December 6, 2007
    Publication date: September 17, 2009
    Inventors: Hyeung-Jin Lee, Chang-Soon Lee, Jong-Eun Kim
  • Patent number: 7550241
    Abstract: The present invention relates to a magnetic mono-component toner composition with positive charge comprising i) a magnetic toner particle containing a charge control agent with positive charge; ii) a hydrophobic silica with negative charge; iii) a fluorinated organic fine powder; and iv) a metal oxide fine powder containing 20 to 80 wt % of tin oxide. The toner has an advantageous in the extended life of the drum, reduction of the background contamination, and improvement of long-term reliability, and thus can be used effectively for image forming apparatus.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: June 23, 2009
    Assignee: LG Chem Ltd.
    Inventors: Won-Sup Lee, Chang-Soon Lee, Joo-Yong Park, Hyeung-Jin Lee
  • Patent number: 7374846
    Abstract: The present invention relates to a non-magnetic monocomponent color toner composition and a method for preparing the same, and more particularly to a non-magnetic monocomponent color toner composition having a narrow charge distribution, good charging characteristics, good environmental independence, superior image characteristics, high transfer efficiency and long-term stability caused by significantly improved charge maintenance capability, and a method for preparing the same. The non-magnetic monocomponent color toner composition of the present invention is prepared by coating organic particles having an average particle size of 0.3 to 2.0 ?m, organic particles having an average particle size of 0.05 to 0.25 ?m, and silica on toner mother particles.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: May 20, 2008
    Assignee: LG Chem, Ltd.
    Inventors: Hyeung-Jin Lee, Tae-Hee Yoon, Joo-Yong Park, Chang-Soon Lee
  • Patent number: 7312009
    Abstract: The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 ?m, a first organic particle having average particle size of 0.3 to 2.0 ?m, a second organic particle having average particle size of 0.05 to 0.25 ?m, and silica having average particle size of 0.006 to 0.04 ?m. The color toner has narrow charge distribution, high chargeability, a low environmental dependence, and excellent image quality, transfer efficiency, and long-term stability by significantly reducing the contamination of the charging elements.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: December 25, 2007
    Assignee: LG Chem, Ltd
    Inventors: Hyeung-Jin Lee, Joo-Yong Park, Chang-Soon Lee