Patents by Inventor Seiga Ito

Seiga Ito 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).

  • Plasminogen activator
    Patent number: 5342775
    Abstract: A novel plasminogen activator which is identical in peptide sequence to naturally occurring human prourokinase except that the 155th amino acid counting from the N-terminal amino acid (serine)] is other than the 155th amino acid (proline) of naturally occurring human prourokinase, optionally with the addition of methionine at the N terminus.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: August 30, 1994
    Assignee: Kyowa Hakko Kogyo Co. Ltd.
    Inventors: Shigeyoshi Yasumura, Tatsunari Nishi, Seiga Ito
  • Plasminogen activator
    Patent number: 5160735
    Abstract: A novel plasminogen activator which is identical in peptide sequence to naturally occurring human prourokinase except that the 155th amino acid counting from the N-terminal amino acid (serine) is other than the 155th amino acid (proline) of naturally occurring human prourokinase, optionally with the addition of methionine at the N terminus.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: November 3, 1992
    Assignee: Kyowa Hakko Kogyo Co. Ltd.
    Inventors: Shigeyoshi Yasumura, Tatsunari Nishi, Seiga Ito
  • Process for producing peptides
    Patent number: 4746608
    Abstract: A peptide can be produced in a high yield by culturing a microorganism containing a recombinant DNA comprising a eukaryotic gene coding for the peptide, a vector and a promoter which is capable of producing the peptide in a medium at a temperature 10.degree. to 25.degree. C. lower than the optimum growth temperature for the microorganism.The invention is advantageously applicable to the production of peptides such as interferon.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: May 24, 1988
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Tamio Mizukami, Seiga Ito, Tetsuo Oka, Tatsunari Nishi