Patents by Inventor Jung-hee Jang

Jung-hee Jang 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).

  • Patent number: 11492568
    Abstract: Disclosed is a composition of a lubricant for cold pilgering of zirconium alloy tubes. More particularly, disclosed is a composition of an internal lubricant for cold pilgering of a zirconium alloy cladding tube, the composition exhibiting excellent lubricity and decomposition against microbes.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: November 8, 2022
    Assignees: KEPCO NUCLEAR FUEL CO., LTD., SHL CO., LTD.
    Inventors: Min Young Park, Sang Jin Han, Ki Bum Park, Jung Woo Cha, Duk Hee Lee, Kyung Tae Kim, Pyeong Mo Yeo, Jeong Jin Jang, Sang Soon Choi
  • Patent number: 11465187
    Abstract: A bent rotor straightening method using low-frequency induction heating and a bent rotor straightening apparatus using the method are proposed. The bent rotor straightening method using low-frequency induction heating according to an embodiment of the present invention includes: calculating a heating speed when a first target temperature for correcting bending of a rotor using low-frequency induction heating is set; maintaining the first target temperature for a heating time determined on the basis of a diameter of the rotor when the first target temperature is reached, when performing primary thermal correction at the heating speed; checking whether a bending amount of the rotor reaches a predetermined critical value in accordance the result of performing the primary thermal correction; and finishing correction of bending of the rotor in accordance with the result of checking the bending amount of the rotor.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: October 11, 2022
    Assignees: KOREA ELECTRIC POWER CORPORATION, KOREA MIDLAND POWER CO., LTD., KOREA WESTERN POWER CO., LTD., KOREA SOUTH POWER CO., LTD., KOREA EAST-WEST POWER CO., LTD.
    Inventors: Kwang-Ha Park, Doo-Young Kim, Hyun-Ku Park, Jung-Hwan Kim, Yong-Hee Jang, Jun-Su Park
  • Patent number: 11434215
    Abstract: Provided is an epoxy reactive diluent, wherein the content of a compound represented by Formula 1 below is 85% by weight or more based on a total weight of an epoxy reactive diluent composition: wherein n is 0, 2, 4 or 6.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: September 6, 2022
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Kee Yoon Roh, Nam Hyun Cho, Jung Hee Jang, Yuncheol Park
  • Publication number: 20220235020
    Abstract: Provided is an epoxy reactive diluent, wherein the content of a compound represented by Formula 1 below is 85% by weight or more based on a total weight of an epoxy reactive diluent composition: wherein n is 0, 2, 4 or 6.
    Type: Application
    Filed: April 14, 2022
    Publication date: July 28, 2022
    Inventors: Kee Yoon ROH, Nam Hyun CHO, Jung Hee JANG, Yuncheol PARK
  • Patent number: 11242442
    Abstract: An additive composition includes a specific amount of ?-methylstyrenated phenol, can be mixed with a main material part or curing agent part for paint, and can suppress the occurrence of a discoloration issue.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: February 8, 2022
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Kee Yoon Roh, Jung Hee Jang, Yun Cheol Park, Nam Hyun Cho
  • Publication number: 20210163435
    Abstract: Provided is an epoxy reactive diluent, wherein the content of a compound represented by Formula 1 below is 85% by weight or more based on a total weight of an epoxy reactive diluent composition: wherein n is 0, 2, 4 or 6.
    Type: Application
    Filed: May 22, 2019
    Publication date: June 3, 2021
    Inventors: Kee Yoon ROH, Nam Hyun CHO, Jung Hee JANG, Yuncheol PARK
  • Publication number: 20200115525
    Abstract: An additive composition includes a specific amount of ?-methylstyrenated phenol, can be mixed with a main material part or curing agent part for paint, and can suppress the occurrence of a discoloration issue.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 16, 2020
    Inventors: Kee Yoon ROH, Jung Hee JANG, Yun Cheol PARK, Nam Hyun CHO
  • Patent number: 10533112
    Abstract: A heavy-duty epoxy coating composition including an epoxy resin, as a main substance, and styrenated phenol represented by Formula 1: wherein n is an integer of 1 to 3.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: January 14, 2020
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Kee Yoon Roh, Jung Hee Jang, Je-young Park
  • Patent number: 9771310
    Abstract: The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: September 26, 2017
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Kee Yoon Roh, Jung Hee Jang, Jin Eok Kim
  • Publication number: 20170096578
    Abstract: A heavy-duty epoxy coating composition including an epoxy resin, as a main substance, and styrenated phenol represented by Formula 1: wherein n is an integer of 1 to 3.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 6, 2017
    Inventors: Kee Yoon ROH, Jung Hee JANG, Je-young PARK
  • Patent number: 9469587
    Abstract: A styrenated phenol compound in which a hydrazine or a diaminoalkane compound binds to a styrenated phenol, and a method of preparing the same are provided. The styrenated phenol compound may have improved exterior quality and storage stability of a product by maintaining a hardening stimulation property and plasticity and preventing discoloration when mixed with a hardener for an epoxy paint.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: October 18, 2016
    Assignee: Korea Kumho Petrochemical Co., Ltd
    Inventors: Kee Yoon Roh, Jung Hee Jang, Je Young Park
  • Patent number: 9464037
    Abstract: Provided is a styrenated phenol compound represented by Formula 1 in which styrenated phenol and hydroxylamine bind to each other: In Formula 1, n is one of integers of 1 to 3, and R1 and R2 are each hydrogen or one of C1 to C4 alkyl groups. The styrenated phenol compound may maintain curing stimulation property and plasticity, and prevent discoloration when being mixed with a curing agent for an epoxy paint, thereby enhancing exterior quality and storage stability of a product.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: October 11, 2016
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD
    Inventors: Kee Yoon Roh, Jung Hee Jang, Je Young Park, Jin Eok Kim
  • Publication number: 20160207859
    Abstract: The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.
    Type: Application
    Filed: November 25, 2013
    Publication date: July 21, 2016
    Inventors: Kee Yoon ROH, Jung Hee JANG, Jin Eok KIM
  • Publication number: 20160046562
    Abstract: Provided is a styrenated phenol compound represented by Formula 1 in which styrenated phenol and hydroxylamine bind to each other: In Formula 1, n is one of integers of 1 to 3, and R1 and R2 are each hydrogen or one of C1 to C4 alkyl groups. The styrenated phenol compound may maintain curing stimulation property and plasticity, and prevent discoloration when being mixed with a curing agent for an epoxy paint, thereby enhancing exterior quality and storage stability of a product.
    Type: Application
    Filed: September 17, 2014
    Publication date: February 18, 2016
    Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Kee Yoon Roh, Jung Hee Jang, Je Young Park, Jin Eok Kim
  • Publication number: 20150376098
    Abstract: A styrenated phenol compound in which a hydrazine or a diaminoalkane compound binds to a styrenated phenol, and a method of preparing the same are provided. The styrenated phenol compound may have improved exterior quality and storage stability of a product by maintaining a hardening stimulation property and plasticity and preventing discoloration when mixed with a hardener for an epoxy paint.
    Type: Application
    Filed: June 24, 2015
    Publication date: December 31, 2015
    Inventors: Kee Yoon ROH, Jung Hee JANG, Je Young PARK
  • Publication number: 20120197044
    Abstract: The present invention relates to a production method for 4,4?-bis(alkylamino)diphenylamine, and more specifically relates to a method in which 4,4?-dinitrodiphenylamine (4,4?-DNDPA) is produced by reacting urea with nitrobenzene in the presence of a polar organic solvent and a base catalyst, and then the 4,4?-bis(alkylamino)diphenylamine (4,4?-BAADA) is produced by subjecting the 4,4?-DNDPA and a ketone to hydrogenation in the presence of a hydrogenation catalyst.
    Type: Application
    Filed: September 30, 2010
    Publication date: August 2, 2012
    Applicant: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Jin Eok Kim, Seung Il Kim, Jung Hee Jang, Han Jin Kwag
  • Patent number: 8211483
    Abstract: The present invention relates to a composition comprising a starch or total dietary fiber which improves the cell viability, specifically, the inventive starch and total dietary fiber isolated from the extract of Gramineae plant and the components therefrom improved the cell viability when the cells were incubated under hypoxic condition, or in the presence of beta-amyloid and 6-hydroxydopamine treatment, as well as prevented and treated myocardiac infarction, cerebral infarction and vascular dementia, or alleviated memory loss, all of which were proven using rats as the respective animal models. Therefore, they can be used as therapeutics or health care food for preventing and treating ischemic diseases or degenerative brain diseases.
    Type: Grant
    Filed: July 4, 2008
    Date of Patent: July 3, 2012
    Assignees: Hypoxi Co., Ltd., Sun Mok Institute Education Foundation
    Inventors: Jong Won Lee, Yae Sil Kim, Kyung Sik Song, Hyung Soo Han, Jung Hee Jang, Chae Ha Yang, Sun Ha Lim
  • Publication number: 20100143513
    Abstract: The present invention relates to a composition comprising a starch or total dietary fiber which improves the cell viability, specifically, the inventive starch and total dietary fiber isolated from the extract of Gramineae plant and the components therefrom improved the cell viability when the cells were incubated under hypoxic condition, or in the presence of beta-amyloid and 6-hydroxydopamine treatment, as well as prevented and treated myocardiac infarction, cerebral infarction and vascular dementia, or alleviated memory loss, all of which were proven using rats as the respective animal models. Therefore, they can be used as therapeutics or health care food for preventing and treating ischemic diseases or degenerative brain diseases.
    Type: Application
    Filed: July 4, 2008
    Publication date: June 10, 2010
    Applicants: HYPOXI CO., LTD, SUN MOK INSTITUTE EDUCATION FOUNDATION
    Inventors: Jong Won Lee, Yae Sil Kim, Kyung Sik Song, Hyung Soo Han, Jung Hee Jang, Chae Ha Yang, Sun Ha Lim
  • Patent number: 7492606
    Abstract: A portable game and digital communication device. The communication device comprises first and second side housings, which include a plurality of keys for video gaming controls. Additionally, the first and second side housings are rotatable about a central axis of the device, such the each of first and second side housings becomes a handle for the device.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: February 17, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jong-Woo Kim, Jung-Hee Jang, Young-Seok Yoon
  • Patent number: 7157605
    Abstract: 4-aminodiphenylamine is prepared by reacting carbanilide and nitrobenzene in an adequate solvent, which may be nitrobenzene, in the presence of an appropriate organic base, which may be tetramethylammonium hydroxide, alone or in mixture with an inorganic base and subsequently reducing the reaction product in the presence of an appropriate catalyst and hydrogen gas. The subsequent reduction may be carried out on the reaction mixture before the reaction mixture is subjected to separation.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: January 2, 2007
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Jin-eok Kim, Jong-cheon Park, Kil-sun Lee, Jung-hee Jang