Patents by Inventor Yoshirou Ishiwata

Yoshirou Ishiwata 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).

  • 3-oxygermylpropionic acid polymer, pharmaceutical composition containing same and method of preventing and/or curing symptoms of immune diseases using same
    Patent number: 5532272
    Abstract: A novel, eight structural polymer of 2-oxygermylpropionic acid having an empirical formula of C.sub.6 H.sub.10 Ge.sub.2 O.sub.7, a minimum constitutional unit of (O.sub.1/2).sub.3 GeCH.sub.2 CH.sub.2 COOH and the following stereostructure: ##STR1## wherein R stands for --CH.sub.2 CH.sub.2 COOH and m is an integer of 137.+-.84. A pharmaceutical composition containing the novel polymer is useful for preventing symptoms of an immune disease such as hepatitis or for curing such a disease.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: July 2, 1996
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Kiichi Sawai, Takahiko Mitani, Naohisa Ninomiya, Yoshirou Ishiwata