Patents by Inventor Jeong Hwan Ku

Jeong Hwan Ku 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: 7939588
    Abstract: A composition includes a salt of a carboxyethyl phosphinate ester compound. Additionally, the composition may also include a polymeric resin, such as a thermoplastic resin. The composition may have improved physical and chemical properties including flame retardancy, thermal stability, and hygroscopicity.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: May 10, 2011
    Assignee: Cheil Industries Inc
    Inventors: Sang Hyun Hong, Jeong Hwan Ku, Su Hak Bae, Jin Hwan Choi, Jin Hwan Kim, Min Soo Lee
  • Patent number: 7838593
    Abstract: A flame retardant molding composition includes a rubber modified aromatic vinyl resin, a polyphenylene ether resin, and a cyclic phosphonate ester compound. A shaped article and an electronic device can be made from the flame retardant molding composition.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: November 23, 2010
    Assignee: Cheil Industries, Inc.
    Inventors: Jeong Hwan Ku, Sang Hyun Hong, Su Hak Bae
  • Patent number: 7723429
    Abstract: A polymer composition includes a rubber-modified aromatic vinyl resin and a cyclic phosphonate ester compound. Embodiments of the composition demonstrate good impact strength, flame retardancy, heat resistance. Some embodiments additionally demonstrate moisture resistance and low heat sag. A shaped article and an electronic device can be made from the flame retardant polymer composition.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: May 25, 2010
    Assignee: Cheil Industries, Inc.
    Inventors: Jeong Hwan Ku, Sang Hyun Hong, Su Hak Bae, Jin Hwan Choi
  • Patent number: 7569629
    Abstract: Flame retardant polycarbonate resin composition are disclosed, which can include (A) about 45 to about 95 parts by weight of a thermoplastic polycarbonate resin; (B) about 1 to about 50 parts by weight of a rubber modified vinyl-grafted copolymer; (C) about 0 to about 50 parts by weight of a vinyl copolymer; (D) about 1 to about 30 parts by weight of an organophosphorus compound consisting of (d1) about 1 to about 75% by weight of a phosphonate compound having a specific structure; and (d2) about 25 to about 99% by weight of an oligomeric phosphate ester compound per 100 parts by weight of the sum of (A), (B) and (C); and (E) about 0.05 to about 5 parts by weight of a fluorinated polyolefin resin per 100 parts by weight of the sum of (A), (B) and (C).
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: August 4, 2009
    Assignee: Cheil Industries Inc.
    Inventors: Sang Hyun Hong, Hyuk Jin Jung, Jeong Hwan Ku
  • Publication number: 20080125526
    Abstract: Disclosed herein is a styrenic resin composition comprising (A) about 15 to about 80 parts by weight of a styrenic resin, (B) about 15 to about 80 parts by weight of a polyphenylene ether resin, and (C) about 0.1 to about 25 parts by weight of a phosphoric compound comprising (c1) about 1 to about 30% by weight of an alkyl phosphinic metal salt and (c2) about 70 to about 99% by weight of an aromatic phosphate ester, per 100 parts by weight of a base resin comprising (A) and (B).
    Type: Application
    Filed: June 28, 2007
    Publication date: May 29, 2008
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Su Hak BAE, Sang Hyun HONG, Jeong Hwan KU, Jae Ho YANG
  • Publication number: 20070155875
    Abstract: A polymer composition includes a rubber-modified aromatic vinyl resin and a cyclic phosphonate ester compound. Embodiments of the composition demonstrate good impact strength, flame retardancy, heat resistance. Some embodiments additionally demonstrate moisture resistance and low heat sag. A shaped article and an electronic device can be made from the flame retardant polymer composition.
    Type: Application
    Filed: November 17, 2006
    Publication date: July 5, 2007
    Inventors: Jeong Hwan Ku, Sang Hyun Hong, Su Hak Bae, Jin Hwan Choi