Patents by Inventor Toshiaki Katsumi

Toshiaki Katsumi 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).

  • Drying-resistant yeast
    Publication number: 20040022897
    Abstract: The present invention provides to an yeast having drying tolerance, which is suitable for producing bread, especially for producing bread with a frozen dough, a dry yeast produced by drying the yeast, a dough comprising the above-mentioned yeast or the above-mentioned dry yeast, and bread produced by using the dough.
    Type: Application
    Filed: June 30, 2003
    Publication date: February 5, 2004
    Inventors: Toshiaki Katsumi, Kinya Ohtsuki, Yasuhiro Tashita
  • Amino acid derivatives
    Patent number: 6245810
    Abstract: A novel amino acid derivative represented by the general formula (I) shown below or a salt thereof have now been provided by chemical synthesis, and it has been found that these new compounds stimulate proliferation and physiological activities of the T cells of mammals, have an immunomodulating activity and also have an antitumor activity or a carcinostatic activity. It has also been found that these new compounds have an effect of stimulating the proliferation of hematopoietic stem cells. wherein y is 0 or 1; R1 represents an unsubstituted C1-C8 alkyl group or others; R2 represents a hydrogen atom, a C1-C5 alkyl group or others; R3 represents a hydrogen atom, a C1-C8 alkyl group or others; R4 represents a hydrogen atom, a C1-C3 alkyl group or others; R5 represents a group —OR42, a group  or others.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: June 12, 2001
    Assignees: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai, Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masaaki Ishizuka, Masaji Kawazu, Toshiaki Katsumi, Yoshihide Fuse, Kenji Maeda, Tomio Takeuchi
  • Amino acid derivatives
    Patent number: 5798387
    Abstract: A novel amino acid derivative represented by the general formula (I) shown below or a salt thereof have now been provided by chemical synthesis, and it has been found that these new compounds stimulate proliferation and physiological activities of the T cells of mammals, have an immunomodulating activity and also have an antitumor activity or a carcinostatic activity. It has also been found that these new compounds have an effect of stimulating the proliferation of hematopoietic stem cells. ##STR1## wherein y is 0 or 1; R.sup.1 represents an unsubstituted C.sub.1 -C.sub.8 alkyl group or others;R.sup.2 represents a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or others;R.sup.3 represents a hydrogen atom, a C.sub.1 -C.sub.8 alkyl group or others;R.sup.4 represents a hydrogen atom, a C.sub.1 -C.sub.3 alkyl group or others;R.sup.5 represents a group --OR.sup.42, a group ##STR2## or others.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: August 25, 1998
    Assignees: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai, Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masaaki Ishizuka, Masaji Kawazu, Toshiaki Katsumi, Yoshihide Fuse, Kenji Maeda, Tomio Takeuchi