Patents by Inventor Koichi Yukishige

Koichi Yukishige 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).

  • Thioglycerol derivatives
    Patent number: 5506267
    Abstract: A compound of the invention is represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, an acyl group; R.sup.3, R.sup.4, R.sup.6 and R.sup.7 are the same or different, hydrogen or an alkyl group; R.sup.5 is hydrogen, an alkyl group or a hydroxyl group which may optionally be protected, or R.sup.4 and R.sup.5 are combined to form a chemical bond; X is a carbonyl group or a sulfonyl group; Y is an amino acid sequence consisting of 1 to 7 amino acid residues which may optionally be protected and having optionally an intervening --SO.sub.2 NH--; n is an integer of 0 to 2, or a salt thereof.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: April 9, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tetsuya Aono, Koichi Yukishige, Seiichi Tanida
  • 2-amino-6,7-dihydroxy-4-thiaheptanoic acid derivatives, production and use thereof
    Patent number: 5478808
    Abstract: A compound of the formula: ##STR1## wherein each of R.sup.1 and R.sup.2 is hydrogen or aliphatic acyl, A is amino which may be protected, X is an amino acid sequence consisting of 1 to 10 amino acid residues which contain at least one amino acid residue having a water-solubility enhancing group, or a salt thereof has an activity of remarkably improving hematopoietic disorder and is useful as an immuno-stimulating agent or an agent for treating thrombocytopenia.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: December 26, 1995
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Seiichi Tanida, Tsuneaki Hida, Mitsuhiro Wakimasu, Setsuo Harada, Koichi Yukishige