Patents by Inventor Sung Ick Cho

Sung Ick Cho 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).

  • Processes for preparing (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3-amine or a salt thereof and processes for preparing tofacitinib using the same
    Patent number: 12227478
    Abstract: Provided are a process for preparing (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3-amine or a salt thereof, which is an intermediate useful for the preparation of tofacitinib, an intermediate used in the process, i.e., isopropanol solvate of methyl ((3R,4R)-1-benzyl-4-methylpiperidin-3-yl)carbamate dibenzoyl-L-tartrate, an intermediate, having excellent stability, useful for the preparation of tofacitinib, i.e., (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3-amine acetate, and a process for preparing tofacitinib or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: February 18, 2025
    Assignee: YUHAN CORPORATION
    Inventors: Sang-Ho Oh, Doo-Byung Lee, Kyoung-Chan Kwon, Sang-Won Kim, Hyo-Ick Hwang, Kyeong-Sill Lee, Ik-Su Jo, Ji-Hye Choi, Sung-Hee Cho, Su-Young Lee
  • Digital broadcast receiver having attachable and separable storage means
    Patent number: 8387157
    Abstract: The present invention relates to a recording and storage means in digital STB (Set Top Box) and PVR (Personal Video Recorder) and method thereof. The digital broadcast receiver for receiving real-time digital broadcast programs comprises: storage means for storing broadcast programs, being attachable and separable to and from a set by a user without taking the set apart; a coupling means for attachment and separation of the storage means to and from a main body of the broadcast receiver; and a connection means as a path for power supply of the storage means, and signal.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: February 26, 2013
    Assignee: Humax Co., Ltd.
    Inventors: Jang Yong Kim, Young Ki Kim, Sung Ick Cho, Kyung Lae Roh