Patents by Inventor Yasutoshi Takeichi

Yasutoshi Takeichi 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).

  • Novel human interferon-.gamma. polypeptide derivative
    Patent number: 4898931
    Abstract: Disclosed is a novel derivative of human IFN-.gamma. polypeptide wherein certain amino acids of human IFN-.gamma. polypeptide are removed and certain amino acids other than said amino acids are replaced with other amino acids. The derivatives have high IFN-.gamma. activity and are expected to be useful as drugs such as anti-viral and anti-tumor agents.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: February 6, 1990
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Seiga Itoh, Yasutoshi Takeichi, Moriyuki Sato
  • DNA coding for a signal amino acid sequence and DNA containing the same
    Patent number: 4663294
    Abstract: This invention relates to DNA consisting of a DNA base sequence coding for the signal amino acid sequence:______________________________________ Met Phe Ala Lys Arg Phe Lys Thr Ser Leu Leu Pro Leu Phe Ala Gly Phe Leu Leu Leu Phe Tyr Leu Val Leu Ala Gly Pro Ala Ala Ala Ser Ala Glu Thr Ala Asn Lys Ser Asn Glu, ______________________________________and to DNA containing such a DNA base sequence. The DNA base sequence coding for said amino acid sequence includes, for example, ______________________________________ ATG TTT GCA AAA CGA TTC AAA ACC TCT TTA CTG CCG TTA TTC GCT GGA TTT TTA TTG CTG TTT TAT TTG GTT CTG GCA GGA CCG GCG GCT GCG AGT GCT GAA ACG GCG AAC AAA TCG AAT GAG. ______________________________________The desired products in cells can be secreted out of cells by the use of a vector containing DNA consisting of the DNA base sequence coding for said signal amino acid sequence.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: May 5, 1987
    Assignees: Kunio Yamane, The Calpis Food Industry Co., Ltd., Mitsui Toatsu Chemicals, Inc.
    Inventors: Kunio Yamane, Kazutaka Ohmura, Akira Nakayama, Yasutoshi Takeichi