Patents by Inventor Won Seok Lee

Won Seok 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).

  • Patent number: 10053573
    Abstract: The present disclosure relates to a thermoplastic resin composition and a method of preparing the same. In accordance with the present disclosure, a thermoplastic resin composition having superior property balance, such as processability, chemical resistance, heat stability, and impact resistance, and excellent transparency, and a method of preparing the same are provided.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 21, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jeong Su Choi, Keun Hoon Yoo, Won Seok Lee, Seok Goo Jang, Roo Da Lee, Sang Hoo Park, Ho Hoon Kim, Hyung Seop Shim
  • Publication number: 20180230301
    Abstract: The present disclosure relates to a thermoplastic resin composition and a method of preparing the same. In accordance with the present disclosure, a thermoplastic resin composition having superior property balance, such as processability, chemical resistance, heat stability, and impact resistance, and excellent transparency, and a method of preparing the same are provided.
    Type: Application
    Filed: July 29, 2016
    Publication date: August 16, 2018
    Inventors: Jeong Su CHOI, Keun Hoon YOO, Won Seok LEE, Seok Goo JANG, Roo Da LEE, Sang Hoo PARK, Ho Hoon KIM, Hyung Seop SHIM
  • Publication number: 20180155507
    Abstract: Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.
    Type: Application
    Filed: August 31, 2015
    Publication date: June 7, 2018
    Inventors: Min Cheol JU, Min Seung SHIN, Won Seok LEE, Hyung Sub LEE, Seok Goo JANG, Jeong Su CHOI, Sung Won HONG, In Soo KIM, Ho Hoon KIM, Sang Hoo PARK, Keun Hoon YOO, Roo Da LEE
  • Publication number: 20180134889
    Abstract: The present disclosure relates to a thermoplastic resin composition and a molded article manufactured from the same. More particularly, the present disclosure relates to a thermoplastic resin composition including (A) a graft copolymer prepared by graft-copolymerizing a conjugated diene rubber, a (meth)acrylic acid alkyl ester compound, a methylene butyrolactone compound, and an aromatic vinyl compound; and (B) a copolymer prepared by copolymerizing a (meth)acrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyanide compound, and a molded article manufactured from the thermoplastic resin composition. In accordance with the present disclosure, a thermoplastic resin composition having superior heat resistance and transparency and a molded article manufactured from the same are provided.
    Type: Application
    Filed: March 2, 2017
    Publication date: May 17, 2018
    Inventors: Won Seok LEE, Jeong Su CHOI, Keun Hoon YOO, Seok Goo JANG, Roo Da LEE, Sang Hoo PARK, Ho Hoon KIM, Hyung Seop SHIM
  • Patent number: 9926444
    Abstract: Disclosed are a thermoplastic resin composition and a method of preparing the same. More particularly, the present invention relates to a thermoplastic resin composition including 10 to 90% by weight of a graft copolymer resin coagulated by an organic acid or an organic acid salt; and 90 to 10% by weight of a non-graft copolymer resin and having a moist-heat characteristic of 20 or less, wherein a refractive index difference between the graft copolymer resin and the non-graft copolymer resin is less than 0.01, a method of preparing the same, and a molded product comprising the same. According to the present disclosure, provided are a thermoplastic resin composition having superior overall property balance, color, and transparency, and being applicable to products that are exposed to high-temperature water or should be sterilized, due to excellent moist-heat resistance thereof, a method of preparing the same, and a molded product comprising the same.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 27, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jeong Su Choi, Min Cheol Ju, Min Seung Shin, Sung Won Hong, In Soo Kim, Ho Hoon Kim, Sang Hoo Park, Keun Hoon Yoo, Roo Da Lee, Won Seok Lee, Hyung Sub Lee, Seok Goo Jang
  • Publication number: 20180054609
    Abstract: A system for generating a disparity map includes: an image obtainer obtaining a left image and a right image; a matching cost calculator calculating a matching cost for each of a plurality of pixels of the left image and the right image; an accumulation and summation calculator calculating an accumulation value of one of the pixels based on the calculated matching cost, and calculating a relaxation accumulation value, which is an average of values obtained by multiplying each of relation coefficients between a disparity value of the one pixel and disparity values of surrounding pixels of the one pixel with the accumulation value of the one pixel; a disparity value deliver deriving a disparity value for each of the pixels based on the calculated relaxation accumulation value; and a disparity map generator generating the disparity map based on the derived disparity value.
    Type: Application
    Filed: November 16, 2016
    Publication date: February 22, 2018
    Inventors: Min Woo Park, Won Seok Lee, Jung Pil Park, Geun Ho Jeong, Soon Ki Jung
  • Publication number: 20180002521
    Abstract: The present invention relates to a thermoplastic resin composition and a molded article including the same. More particularly, the present invention relates to a thermoplastic resin composition including 100 parts by weight of a base resin that includes an acrylic graft copolymer and an acrylic non-graft copolymer; and greater than 0.3 parts by weight and less than 1.2 parts by weight of a zinc-based antimicrobial agent, and a molded article including the same, wherein the zinc-based antimicrobial agent has an average particle diameter of greater than 3 ?m to 30 ?m. In accordance with the present invention, a thermoplastic resin composition providing superior transparency and excellent initial antimicrobial activity and persistent antimicrobial activity while providing the same mechanical properties as existing resin compositions, and a molded article including the same are provided.
    Type: Application
    Filed: December 1, 2016
    Publication date: January 4, 2018
    Inventors: Seok Goo JANG, Jeong Su CHOI, Keun Hoon YOO, Won Seok LEE, Roo Da LEE, Sang Hoo PARK, Ho Hoon KIM, Hyung Seop SHIM
  • Publication number: 20170355845
    Abstract: The present invention relates to a transparent thermoplastic resin. More particularly, the present invention relates to a transparent thermoplastic resin, including a random copolymerization block prepared by polymerizing 50 to 80% by weight of an aromatic vinyl compound, 10 to 30% by weight of a vinyl cyanide compound, and 0 to 15% by weight of (meth)acrylic acid alkyl ester; and an aromatic vinyl compound block prepared by polymerizing 1 to 10% by weight of an aromatic vinyl compound, a transparent thermoplastic resin composition including the transparent thermoplastic resin, and methods of preparing the aromatic vinyl compound and transparent thermoplastic resin.
    Type: Application
    Filed: November 9, 2016
    Publication date: December 14, 2017
    Applicant: LG CHEM, LTD.
    Inventors: Roo Da LEE, Jeong Su CHOI, Keun Hoon YOO, Won Seok LEE, Seok Goo JANG, Sang Hoo PARK, Ho Hoon KIM, Hyung Seop SHIM
  • Patent number: 9840618
    Abstract: Disclosed are a transparent resin composition, which may be used in medical products and food storage containers, having superior chemical resistance and transparency, a method of preparing the same and a molded article manufactured therefrom. More particularly, disclosed are a thermoplastic transparent resin composition having superior chemical resistance and transparency, which comprises (A) a graft copolymer in which a) a conjugated diene rubber latex is graft copolymerized with b) a methacrylate alkyl ester compound or an acrylate alkyl ester compound, c) an aromatic vinyl compound, and d) a vinyl cyano compound; (B) a copolymerized resin in which i) a methacrylate alkyl ester compound or an acrylate alkyl ester compound, ii) an aromatic vinyl compound and iii) a vinyl cyano compound are copolymerized; and (C) a polyether-amide block copolymer, a method of preparing the same, and a molded article manufactured therefrom.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: December 12, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Jeong Su Choi, Ho Hoon Kim, Sang Hoo Park, Keun Hoon Yoo, Roo Da Lee, Won Seok Lee, Seok Goo Jang
  • Patent number: 9834645
    Abstract: Provided are a thermoplastic resin composition having high environmental stress crack resistance (ESCR) as well as excellent impact resistance and transparency and a thermoplastic resin molded article prepared therefrom. The thermoplastic resin composition includes a graft copolymer (A), in which a (meth)acrylic acid ester, a vinyl cyan-based compound, and an aromatic vinyl compound are graft polymerized with a conjugated diene-based rubber latex; and a copolymer (B) of a (meth)acrylic acid ester-aromatic vinyl compound-vinyl cyan-based compound in a weight ratio of 35:65 to 70:30. A difference in refractive indices of the graft copolymer (A) and the copolymer (B) of the (meth)acrylic acid ester-aromatic vinyl compound-vinyl cyan-based compound is less than 0.003 when irradiated with light having a wavelength of 450 nm to 680 nm, and a melt index is 4.0 g/10 min or less when the melt index is measured in accordance with ASTM D1238.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: December 5, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Keun Hoon Yoo, Jeong Su Choi, Won Seok Lee, Seok Goo Jang, Roo Da Lee, Sang Hoo Park, Ho Hoon Kim
  • Patent number: 9812789
    Abstract: The present invention relates to an array antenna apparatus, comprising: a first antenna element arranged in the center of the outermost concentric circle having a radius determined according to the beam width of a beam to transmit; and antenna element sets arranged on the circumference of each of concentric circles arranged to have a predetermined interval within the outermost concentric circle, wherein each of the antenna element sets comprises an odd number of second antenna elements, and only one antenna element exists on a straight line corresponding to the radius.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: November 7, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Won-Seok Lee, Seung-Tae Khang, Yong-Hoon Kim, Kyoung-Sub Oh, Jong-Won Yu
  • Publication number: 20170313312
    Abstract: Disclosed are an adaptive cruise control apparatus and an adaptive cruise control method using the same. An adaptive cruise control apparatus comprises an image acquisition device for acquiring image data in front of a subject vehicle; and a processor configured to detect presence of a forward vehicle using the image data; obtain information on the forward vehicle by using information on the presence of the forward vehicle and the image data; and predict a trajectory and speed of the subject vehicle using the information on the forward vehicle.
    Type: Application
    Filed: April 27, 2017
    Publication date: November 2, 2017
    Inventors: Min Woo PARK, Jin Hyuk CHOI, Yong Cheon NA, Won Seok LEE, Tae Gon PARK
  • Publication number: 20170307756
    Abstract: An ultrasonic transducer having a flexible printed circuit board with a thick metal layer and a manufacturing method thereof are disclosed. The ultrasonic transducer, according to an embodiment of the present invention, comprises: an active element that generates an ultrasonic signal, wherein the active element has a thickness of ΒΌ? or less at the center frequency of the generated ultrasonic signal; and a flexible printed circuit board that includes a metal layer with a predetermined thickness, which is formed on one surface of the active element and is electrically connected to the active element, wherein the metal layer blocks ultrasonic waves that propagate in an opposite direction to a predetermined travel path of the ultrasonic waves.
    Type: Application
    Filed: December 22, 2014
    Publication date: October 26, 2017
    Applicant: ALPINION MEDICAL SYSTEMS CO., LTD.
    Inventor: Won-Seok LEE
  • Patent number: 9790356
    Abstract: The present invention relates to a method of preparing a thermoplastic resin. In accordance with the present invention, provided is a thermoplastic resin having superior antibiosis and melt-kneadability prepared through preparation of a graft copolymer latex and coagulation of the graft copolymer latex with a specific antimicrobial agent, and a method of preparing the thermoplastic resin to prepare a thermoplastic resin composition including the thermoplastic resin.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: October 17, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Hyun Taek Oh, Jeong Su Choi, Keun Hoon Yoo, Bong Keun Ahn, Won Seok Lee, Seok Goo Jang, Roo Da Lee, Sang Hoo Park, Ho Hoon Kim, Hyung Seop Shim
  • Publication number: 20170260384
    Abstract: Disclosed are a thermoplastic resin composition and a method of preparing the same. More particularly, the present invention relates to a thermoplastic resin composition including 10 to 90% by weight of a graft copolymer resin coagulated by an organic acid or an organic acid salt; and 90 to 10% by weight of a non-graft copolymer resin and having a moist-heat characteristic of 20 or less, wherein a refractive index difference between the graft copolymer resin and the non-graft copolymer resin is less than 0.01, a method of preparing the same, and a molded product comprising the same. According to the present disclosure, provided are a thermoplastic resin composition having superior overall property balance, color, and transparency, and being applicable to products that are exposed to high-temperature water or should be sterilized, due to excellent moist-heat resistance thereof, a method of preparing the same, and a molded product comprising the same.
    Type: Application
    Filed: October 15, 2015
    Publication date: September 14, 2017
    Inventors: Jeong Su CHOI, Min Cheol JU, Min Seung SHIN, Sung Won HONG, In Soo KIM, Ho Hoon KIM, Sang Hoo PARK, Keun Hoon YOO, Roo Da LEE, Won Seok LEE, Hyung Sub LEE, Seok Goo JANG
  • Publication number: 20170198132
    Abstract: Disclosed are a transparent resin composition, which may be used in medical products and food storage containers, having superior chemical resistance and transparency, a method of preparing the same and a molded article manufactured therefrom. More particularly, disclosed are a thermoplastic transparent resin composition having superior chemical resistance and transparency, which comprises (A) a graft copolymer in which a) a conjugated diene rubber latex is graft copolymerized with b) a methacrylate alkyl ester compound or an acrylate alkyl ester compound, c) an aromatic vinyl compound, and d) a vinyl cyano compound; (B) a copolymerized resin in which i) a methacrylate alkyl ester compound or an acrylate alkyl ester compound, ii) an aromatic vinyl compound and iii) a vinyl cyano compound are copolymerized; and (C) a polyether-amide block copolymer, a method of preparing the same, and a molded article manufactured therefrom.
    Type: Application
    Filed: June 8, 2015
    Publication date: July 13, 2017
    Inventors: Jeong Su CHOI, Ho Hoon KIM, Sang Hoo PARK, Keun Hoon YOO, Roo Da LEE, Won Seok LEE, Seok Goo JANG
  • Publication number: 20170183455
    Abstract: Provided are a thermoplastic resin composition having high environmental stress crack resistance (ESCR) as well as excellent impact resistance and transparency and a thermoplastic resin molded article prepared therefrom.
    Type: Application
    Filed: July 23, 2015
    Publication date: June 29, 2017
    Inventors: Keun Hoon YOO, Jeong Su CHOI, Won Seok LEE, Seok Goo JANG, Roo Da LEE, Sang Hoo PARK, Ho Hoon KIM
  • Patent number: 9683069
    Abstract: The present invention relates to a method for preparing a weather resistant reinforced acrylate based resin. More specifically, an activator-free conversion rate improver is included in an acrylate-styrene based graft copolymer, thereby improving the haze value, light transmittance, and yellow index when mixed with an acrylate-styrene based non-graft copolymer, and securing the weather resistance. In particular, according to the present invention, a weather resistant reinforced thermoplastic resin having excellent colors which are close to natural colors can be provided even without using sodium formaldehyde sulfoxylate (SFS) and iron ions.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 20, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Roo Da Lee, Sang Hoo Park, Won Seok Lee, Seok Goo Jang, Jeong Su Choi, Jeun Hoon Yoo
  • Publication number: 20170131927
    Abstract: A memory access control method that can prevent a cell hammer phenomenon includes setting at least a part of all the memory cells a safe memory region, and setting the remaining memory cells to a normal memory region. In the safe memory region, some cells set to an enabled state are accessible for data writing or reading, and the remaining cells set to a disabled state are inaccessible. Based on a safe address mapping algorithm, access to all memory cells in the safe memory region is controlled such that access to the enabled memory cells is allowed and access to the disabled memory cells is prevented. The enabled memory cells in the safe memory region are spaced apart from each other by at least one disabled memory cell in a horizontal and/or vertical direction.
    Type: Application
    Filed: November 8, 2016
    Publication date: May 11, 2017
    Inventors: YOUNG-JIN PARK, CHAN-IK PARK, WON-SEOK LEE
  • Patent number: 9642697
    Abstract: The present invention relates to a breast prosthesis allowing controlled release of a drug and to a production method for same, and more specifically, relates to a breast prosthesis allowing controlled release of a drug by the coupling of a drug layer comprising particles carrying the drug on the breast prosthesis, and to a production method for same.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: May 9, 2017
    Assignee: SNU R&DB FOUNDATION
    Inventors: Chan Yeong Heo, Young Bin Choy, Min Park, Su Bin Park, Won Seok Lee, Byung Hwi Kim