Patents by Inventor Kyung Wha CHOI

Kyung Wha CHOI 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).

  • Hot-press gas grafting hydrophobization apparatus, and eco-friendly oil-absorbing low- weight paper manufactured using same
    Patent number: 11905664
    Abstract: The present invention relates to a press-heating gas grafting hydrophobization apparatus, and a hot water-resistant paper and an oil-absorbing paper manufactured using the press-heating gas grafting hydrophobization apparatus. In the press-heating gas grafting hydrophobization apparatus according to the present invention, since a non-air-permeable dryer belt is provided surrounding and pressing a drying roller to prevent dissipation from a base material of a fatty acid chloride vaporized by the drying roller, the press-heating gas grafting hydrophobization apparatus has an advantage of improving efficiency of a gas grafting reaction. Therefore, by using the press-heating gas grafting hydrophobization apparatus according to the present invention, the reaction amount of fatty acid chloride per unit area can be remarkably improved.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: February 20, 2024
    Assignees: KNU-Industry Cooperation Foundation, Daehan Paper Co., Ltd., Taekyung Polymer Co., Ltd.
    Inventors: Myoung Ku Lee, Jeong Yong Ryu, Kwang Seob Lee, Jae Hoon Lee, Han Je Cho, Hyeok Jun Kwon, David Guerin, Philippe Martinez, Kyung Wha Choi
  • HOT-PRESS GAS GRAFTING HYDROPHOBIZATION APPARATUS, AND ECO-FRIENDLY OIL-ABSORBING LOW-WEIGHT PAPER MANUFACTURED USING SAME
    Publication number: 20210381171
    Abstract: The present invention relates to a press-heating gas grafting hydrophobization apparatus, and a hot water-resistant paper and an oil-absorbing paper manufactured using the press-heating gas grafting hydrophobization apparatus. In the press-heating gas grafting hydrophobization apparatus according to the present invention, since a non-air-permeable dryer belt is provided surrounding and pressing a drying roller to prevent dissipation from a base material of a fatty acid chloride vaporized by the drying roller, the press-heating gas grafting hydrophobization apparatus has an advantage of improving efficiency of a gas grafting reaction. Therefore, by using the press-heating gas grafting hydrophobization apparatus according to the present invention, the reaction amount of fatty acid chloride per unit area can be remarkably improved.
    Type: Application
    Filed: September 17, 2019
    Publication date: December 9, 2021
    Inventors: Myoung Ku LEE, Jeong Yong RYU, Kwang Seob LEE, Jae Hoon LEE, Han Je CHO, Hyeok Jun KWON, David GUERIN, Philippe MARTINEZ, Kyung Wha CHOI