Patents by Inventor Hyo-sup CHANG

Hyo-sup CHANG 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: 12042055
    Abstract: The present invention relates to a flame-retardant nonwoven fabric for a mattress, and a flame-retardant nonwoven fabric for mattresses comprising flame-retardant rayon (FR-Rayon) staple fibers of 20 to 50% by weight; modacrylic staple fibers of 30 to 60% by weight; polyimide (PI) staple fibers of 10 to 30% by weight; and low melting polyester (LM PET) staple fibers of 5 to 20% by weight provides enhanced flame retarding and mechanical properties.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: July 23, 2024
    Assignee: DITGREEN CO., LTD.
    Inventors: Soon-yong Park, Jae-ryong Moon, Yong-dug Choi, Hyo-sup Chang, Yong-seok Park, Woo-hyung Lee, Bo-gyeong Cha
  • Patent number: 12037723
    Abstract: A cloth for mattress including a knitted fabric that is knitted from blended yarns contains flame retardant rayon fibers, modacrylic fibers, polyimide fibers, and low-melting polyester fibers. The cloth for mattress can be obtained by producing blended yarns containing the flame retardant rayon fibers, the modacrylic fibers, the polyimide fibers, and the low-melting polyester fibers, and producing a knitted fabric by knitting the blended yarns. The cloth for mattress has excellent flame retardancy, ensures easy handling when used to cover a mattress, is resistant to pilling without reducing the strength of the blended yarns, and is also safe for contact with the human body.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: July 16, 2024
    Assignees: KANEKA CORPORATION, DITGREEN CO., LTD.
    Inventors: Soon-Yong Park, Hyo-Sup Chang, Woo-Hyung Lee, Mi-Young Jung, Tatsuro Ohzeki
  • Publication number: 20230019403
    Abstract: A cloth for mattress including a knitted fabric that is knitted from blended yarns contains flame retardant rayon fibers, modacrylic fibers, polyimide fibers, and low-melting polyester fibers. The cloth for mattress can be obtained by producing blended yarns containing the flame retardant rayon fibers, the modacrylic fibers, the polyimide fibers, and the low-melting polyester fibers, and producing a knitted fabric by knitting the blended yarns. The cloth for mattress has excellent flame retardancy, ensures easy handling when used to cover a mattress, is resistant to pilling without reducing the strength of the blended yarns, and is also safe for contact with the human body.
    Type: Application
    Filed: September 1, 2022
    Publication date: January 19, 2023
    Applicants: KANEKA CORPORATION, DITGREEN CO., LTD.
    Inventors: Soon-Yong Park, Hyo-Sup Chang, Woo-Hyung Lee, Mi-Young Jung, Tatsuro Ohzeki
  • Publication number: 20220361685
    Abstract: The present invention relates to a flame-retardant nonwoven fabric for a mattress, and a flame-retardant nonwoven fabric for mattresses comprising flame-retardant rayon (FR-Rayon) staple fibers of 20 to 50% by weight; modacrylic staple fibers of 30 to 60% by weight; polyimide (PI) staple fibers of 10 to 30% by weight; and low melting polyester (LM PET) staple fibers of 5 to 20% by weight provides enhanced flame retarding and mechanical properties.
    Type: Application
    Filed: June 10, 2021
    Publication date: November 17, 2022
    Applicant: DITGreen Co., Ltd.
    Inventors: Soon-yong PARK, Jae-ryong MOON, Yong-dug CHOI, Hyo-sup CHANG, Yong-seok PARK, Woo-hyung LEE, Bo-gyeong CHA