Patents by Inventor Jun Utsumi

Jun Utsumi 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).

  • Interlekin-6 compositions, and a production process thereof
    Patent number: 5641868
    Abstract: The present invention relates to compositions containing human interleukin-6 with sugar chains, a process for preparing human interleukin-6 by culturing cells in a medium containing ascorbic acid or any of its derivatives, and a process for purifying a crude raw human interleukin-6 solution by chromatography using a carrier with heparin bound. The present invention has allowed the production of high quality human interleukin-6 compositions with sugar chains, and their application to medicines. Furthermore, it has established a process for massproducing human interleukin-6.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: June 24, 1997
    Assignee: Toray Industries, Inc.
    Inventors: Shingou Sakurai, Masanobu Naruto, Makoto Kihara, Keizo Hanada, Emiko Sano, Shigeru Ichikura, Jun Utsumi, Kazuo Hosoi