Patents by Inventor Ichirou Kitada

Ichirou Kitada 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).

  • Galactosamine substitute of poly-.omega.-substituted-L-glutamic acid (or aspartic acid)
    Patent number: 5124437
    Abstract: A galactosamine substituted poly-.omega.-alkyl (or benzyl)-L-glutamic acid (or aspartic acid) is provided and comprises a polypeptide having the recurring unit represented by the formula: ##STR1## wherein X has a value of 60 to 250; n is 1 or 2; and R represents a lower alkyl group or benzyl group, in which a part or all of the peptide in said polypeptide is substituted by an .omega.-galactosamyl-L-glutamic acid (or aspartic acid) residue represented by the general formula: ##STR2## wherein n is as indicated.
    Type: Grant
    Filed: April 23, 1991
    Date of Patent: June 23, 1992
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Toshihiro Akaike, Ichirou Kitada, Megumi Kunou