Patents by Inventor Sang-Mi Lee

Sang-Mi 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: 11655318
    Abstract: A method of preparing super absorbent polymer includes carrying out a crosslinking polymerization of a monomer mixture comprising a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups, a forming agent, a foam-promoting agent and a silicone-based surfactant in the presence of an internal crosslinking agent to form a hydrogel polymer; drying, pulverizing and classifying the hydrogel polymer to form a base polymer powder; and further crosslinking a surface of the base polymer powder in the presence of a surface crosslinking agent to form a surface crosslinked layer. The method produces super absorbent polymer having not only an excellent absorbent capacity and an absorbency under load but also the rewetting phenomenon can be effectively prevented.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 23, 2023
    Inventors: Sang Gi Lee, Hye Mi Nam, Min Ho Hwang, Soo Jin Lee, Tae Hwan Jang
  • Patent number: 11441075
    Abstract: A liquid crystal alignment agent composition for producing a liquid crystal alignment film having enhanced alignment property and stability and a high voltage holding ratio, a method of producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same, are provided.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: September 13, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Seongku Kim, Sung Joon Min, Hoonseo Park, Hyeong Seuk Yun, Sang Mi Lee, Jung Ho Jo
  • Patent number: 11345856
    Abstract: The present invention provides a liquid crystal aligning agent composition that has excellent storage stability, can secure a high imidization rate, and can produce a liquid crystal alignment film having improved film strength together with liquid crystal alignment properties, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: May 31, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Sang Mi Lee, Jung Ho Jo, Hang Ah Park, Hyeong Seuk Yun, Jun Young Yoon
  • Patent number: 11287700
    Abstract: The present invention relates to a polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent containing the same, a liquid crystal aligning film formed from the liquid crystal alignment agent, and a liquid crystal display device containing the liquid crystal aligning film.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: March 29, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Jung Ho Jo, Sung Joon Min, Sang Mi Lee, Kichul Koo, Jun Young Yoon, Hyeong Seuk Yun, Yoon Bin Lim, Seongku Kim
  • Patent number: 11286348
    Abstract: The present invention relates to a polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent containing the same, a liquid crystal aligning film formed from the liquid crystal alignment agent, and a liquid crystal display device containing the liquid crystal aligning film.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: March 29, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Kichul Koo, Jung Ho Jo, Sung Joon Min, Sang Mi Lee, Jun Young Yoon, Hyeong Seuk Yun, Yoon Bin Lim
  • Publication number: 20220089631
    Abstract: The present invention relates to a use of a compound comprising a multivalent sialyloligosaccharide residue, an optical isomer thereof or a pharmaceutically acceptable salt thereof, and a composition comprising the same as an active ingredient for preventing or treating viral infectious diseases. The present invention shows high hemagglutination inhibitory activity and virus neutralizing activity so as to have excellent antiviral activity, thereby being effectively usable as a composition for preventing or treating viral infectious diseases.
    Type: Application
    Filed: August 22, 2019
    Publication date: March 24, 2022
    Inventors: Jin Suk WOO, Dae Hee KIM, Sang Mi LEE, Sang Eun YOO, Won Min SEO, Ji Young YANG, Li La KIM
  • Patent number: 11230670
    Abstract: The present invention relates to a liquid crystal aligning agent composition for producing a liquid crystal alignment film having improved film strength together with liquid crystal alignment properties, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: January 25, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Sang Mi Lee, Hee Han, Jung Ho Jo, Sung Joon Min, Hang Ah Park, Soon Ho Kwon, Jun Young Yoon, Hyeong Seuk Yun, Seongku Kim, Hoonseo Park
  • Patent number: 11142697
    Abstract: The present invention relates to a liquid crystal aligning agent composition capable of securing a high imidization rate under relatively mild curing conditions, minimizing side reactions and thus having excellent stability, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: October 12, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jung Ho Jo, Hee Han, Sung Joon Min, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon, Hyeong Seuk Yun, Seongku Kim
  • Patent number: 11073728
    Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 27, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
  • Patent number: 11036089
    Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: June 15, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
  • Publication number: 20210171689
    Abstract: The present invention provides a method for preparing a modified and conjugated diene-based polymer, which may prevent processability degradation by restraining the increase of mooney viscosity during post-treatment using steam with high temperature or storage for a long time by stabilizing a modified polymer using a modification stabilizer, and a modified and conjugated diene-based polymer prepared by the preparation method.
    Type: Application
    Filed: February 17, 2021
    Publication date: June 10, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Ho Young Lee, No Ma Kim, Sang Mi Lee, Sun Keun Kim
  • Publication number: 20210139780
    Abstract: The present invention relates to a polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent containing the same, a liquid crystal aligning film formed from the liquid crystal alignment agent, and a liquid crystal display device containing the liquid crystal aligning film.
    Type: Application
    Filed: May 14, 2018
    Publication date: May 13, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Jung Ho JO, Sung Joon MIN, Sang Mi LEE, Kichul KOO, Jun Young YOON, Hyeong Seuk YUN, Yoon Bin LIM, Seongku KIM
  • Patent number: 10982147
    Abstract: The present invention relates to a liquid crystal aligning agent composition for forming a liquid crystal alignment film exhibiting excellent alignment and electrical characteristics and simultaneously having excellent film strength, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: April 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Seongku Kim, Hee Han, Jung Ho Jo, Sung Joon Min, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon, Hyeong Seuk Yun, Hoonseo Park
  • Patent number: 10968302
    Abstract: The present invention provides a method for preparing a modified and conjugated diene-based polymer, which may prevent processability degradation by restraining the increase of mooney viscosity during post-treatment using steam with high temperature or storage for a long time by stabilizing a modified polymer using a modification stabilizer, and a modified and conjugated diene-based polymer prepared by the preparation method.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: April 6, 2021
    Inventors: Ho Young Lee, No Ma Kim, Sang Mi Lee, Sun Keun Kim
  • Patent number: 10920004
    Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 16, 2021
    Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung Lee
  • Patent number: 10882939
    Abstract: The present invention relates to a method for preparing a modified conjugated diene-based polymer, and more particularly, provides a method for preparing a modified conjugated diene-based polymer including a step of polymerizing a conjugated diene-based monomer in the presence of an organometal compound in a hydrocarbon solvent to prepare an active polymer which is coupled with an organometal (S1); and a step of reacting or coupling the active polymer prepared in step (S1) with a modifier (S2), wherein step (S1) is continuously performed in two or more polymerization reactors, and a polymerization conversion ratio in a first reactor among the polymerization reactors is 50% or less.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 5, 2021
    Inventors: Jin Young Kim, Jun Seok Ko, No Ma Kim, Yu Jin Kim, Ki Seok Son, Hae Sung Sohn, Ro Mi Lee, Sang Mi Lee, Tae Chui Lee, He Seung Lee
  • Publication number: 20200343520
    Abstract: Disclosed is a secondary battery, which has a reinforced strength and can simplify the manufacturing process thereof. For example, one embodiment provides a secondary battery which comprises: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.
    Type: Application
    Filed: October 8, 2018
    Publication date: October 29, 2020
    Inventors: Hyun Ki JEONG, Ho Jae LEE, Jung Hyun PARK, June Hyoung PARK, Sang Mi LEE, Won Ik LEE, Ye Ji CHA, Nobuyuki OYAGI
  • Patent number: 10815314
    Abstract: The present invention relates to a modified conjugated diene-based polymer containing a functional group derived from a tertiary amine compound represented by Formula 1, a method of preparing the same, and a tertiary amine compound represented by Formula 1.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: October 27, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Sang Mi Lee, Hae Sung Sohn, Heung Yeal Choi, No Ma Kim
  • Publication number: 20200235369
    Abstract: An embodiment of the present invention relates to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery which has low resistance and can output high power without loss of capacity, and can prevent deformation or cracking of an electrode assembly. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly which is received in the cylindrical can and includes multiple first tabs extending in a first direction which is a longitudinal direction of the cylindrical can, and multiple second tabs extending in a second direction opposite to the first direction; a cap assembly for sealing the cylindrical can; a first current collecting structure which electrically connects the multiple first tabs to the cap assembly while being insulated from the cylindrical can; and a second current collecting structure for electrically connecting the multiple second tabs to the cylindrical can.
    Type: Application
    Filed: July 31, 2018
    Publication date: July 23, 2020
    Inventors: Hyun Ki JEONG, Ho Jae LEE, Jung Hyun PARK, June Hyoung PARK, Nobuyuki OYAGI, Sang Mi LEE, Won Ik LEE, Ye Ji CHA
  • Bag
    Patent number: D975434
    Type: Grant
    Filed: November 26, 2020
    Date of Patent: January 17, 2023
    Assignee: SUNG JOO D&D, INC.
    Inventors: SungJoo Kim, Youngnan Jang, SooJung Seo, Sooyeon Lee, Jihyun Nam, Hey Min Park, Sanghee Lee, Sun Young Ahn, Sang Mi Lee, Eun Soo Choo, Jihye Lim