Patents by Inventor Geon Ja LIM

Geon Ja LIM 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).

  • Separation membrane coating agent composition, separation membrane made from coating agent composition, and battery using same
    Patent number: 10050247
    Abstract: Disclosed herein is a coating composition having excellent thermal resistance and drying processability, utilizing polyamic acid having high thermal resistance and excellent solubility in a low boiling point solvent. Specifically, the coating composition includes polyamic acid and a low boiling point solvent having a boiling point less than 150° C. Also, disclosed herein a separator having improved thermal resistance by coating the coating composition on one or both surfaces of a polyolefin-based substrate film, and an electrochemical battery having improved thermal stability by using the separator.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: August 14, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventors: In Sik Jeon, Jin Kyu Park, Jun Ho Chung, Ki Chul Hong, Geon Ja Lim
  • Separator including coating layer and battery including the same
    Patent number: 9685647
    Abstract: A separator includes a polyolefin base film and a coating layer, the coating layer containing inorganic particles having an average particle size of about 1 nm to about 700 nm and an organic binder of a polyvinylidene fluoride homopolymer, the coating layer having a density of about 1.2 g/cm3 to about 2 g/cm3, the coating layer being disposed on one or both sides of the base film.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: June 20, 2017
    Assignee: CHEIL INDUSTRIES, INC.
    Inventors: Ki Chul Hong, Jae Goo Doh, Geon Ja Lim, Jun Ho Chung
  • Separator including coating layer of inorganic and organic mixture, and battery including the same
    Patent number: 9401505
    Abstract: A polyolefin porous separator includes a polyolefin porous base film, and a coating layer formed on one or both sides of the base film. The coating layer includes inorganic particles. The inorganic particles include first inorganic particles having an average particle size ranging from 150 nm to 600 nm, and second inorganic particles having an average particle size ranging from 5 nm to 90 nm. The separator has a thermal conductivity of 0.3 W/m·K or more.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: July 26, 2016
    Assignee: CHEIL INDUSTRIES, INC.
    Inventors: Ki Chul Hong, Myung Kook Park, Jae Goo Doh, Jun Ho Chung, Geon Ja Lim
  • SEPARATION MEMBRANE COATING AGENT COMPOSITION, SEPARATION MEMBRANE MADE FROM COATING AGENT COMPOSITION, AND BATTERY USING SAME
    Publication number: 20150207123
    Abstract: Disclosed herein is a coating composition having excellent thermal resistance and drying processability, utilizing polyamic acid having high thermal resistance and excellent solubility in a low boiling point solvent. Specifically, the coating composition includes polyamic acid and a low boiling point solvent having a boiling point less than 150° C. Also, disclosed herein a separator having improved thermal resistance by coating the coating composition on one or both surfaces of a polyolefin-based substrate film, and an electrochemical battery having improved thermal stability by using the separator.
    Type: Application
    Filed: July 31, 2013
    Publication date: July 23, 2015
    Inventors: In Sik Jeon, Jin Kyu Park, Jun Ho Chung, Ki Chul Hong, Geon Ja Lim
  • SEPARATOR INCLUDING COATING LAYER OF INORGANIC AND ORGANIC MIXTURE, AND BATTERY INCLUDING THE SAME
    Publication number: 20130224555
    Abstract: A polyolefin porous separator includes a polyolefin porous base film, and a coating layer formed on one or both sides of the base film. The coating layer includes inorganic particles. The inorganic particles include first inorganic particles having an average particle size ranging from 150 nm to 600 nm, and second inorganic particles having an average particle size ranging from 5 nm to 90 nm. The separator has a thermal conductivity of 0.3 W/m·K or more.
    Type: Application
    Filed: February 27, 2013
    Publication date: August 29, 2013
    Inventors: Ki Chul HONG, Myung Kook PARK, Jae Goo DOH, Jun Ho CHUNG, Geon Ja LIM
  • SEPARATOR INCLUDING COATING LAYER AND BATTERY INCLUDING THE SAME
    Publication number: 20130224552
    Abstract: A separator includes a polyolefin base film and a coating layer, the coating layer containing inorganic particles having an average particle size of about 1 nm to about 700 nm and an organic binder of a polyvinylidene fluoride homopolymer, the coating layer having a density of about 1.2 g/m3 to about 2 g/m3, the coating layer being disposed on one or both sides of the base film.
    Type: Application
    Filed: February 27, 2013
    Publication date: August 29, 2013
    Inventors: Ki Chul HONG, Jae Goo DOH, Geon Ja LIM, Jun Ho CHUNG