Patents by Inventor Ju-Hyun Ahn

Ju-Hyun Ahn 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).

  • Method for preparing polyetherketoneketone and polyetherketoneketone prepared thereby
    Patent number: 11919999
    Abstract: Provided are a method for preparing a polyetherketoneketone and a polyetherketoneketone prepared thereby, wherein, at the time of a polymerization reaction, nitrogen gas is blown into a liquid reaction medium while stirring, thereby quickly removing hydrochloric acid, which is a by-product generated during the reaction, and preventing aggregation of resin particles, thus suppressing the generation of scales.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: March 5, 2024
    Assignee: HANWHA CHEMICAL CORPORATION
    Inventors: Kwang Seok Jeong, Min Sung Kim, Jae Heon Kim, Ju Young Park, Cho Hee Ahn, Byeong Hyeon Lee, Sang Hyun Cho
  • Mobile phone
    Patent number: D543530
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: May 29, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-Hyun Ahn, Hyun-Sook Kim, Yoon-Young Cho, Chang-Hwan Hwang
  • Portable telephone
    Patent number: D546796
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: July 17, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju Hyun Ahn, Hyun Sook Kim, Yoon Young Cho, Chang Hwan Hwang
  • Portable phone
    Patent number: D569825
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: May 27, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Sook Kim, Ju-Hyun Ahn, Yoon-Young Cho, Chang-Hwan Hwang
  • Mobile phone
    Patent number: D570316
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: June 3, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju Hyun Ahn, Hyun Sook Kim, Yoon Young Cho, Chang Hwan Hwang
  • Portable phone
    Patent number: D571758
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: June 24, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-Hyun Ahn, Hyun-Sook Kim, Yoon-Young Cho, Chang-Hwan Hwang
  • Portable phone
    Patent number: D582870
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: December 16, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-Hyun Ahn, Hyun-Sook Kim, Yoon-Young Cho, Chang-Hwan Hwang