Patents by Inventor Kimihiko Takada

Kimihiko Takada 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).

  • Platinum complexes
    Patent number: 5130450
    Abstract: A platinum (II) complex represented by the general formula: ##STR1## [wherein A's are each ammonia or two A's jointly represent 1,2-diaminocyclohexane, 1-amino-1-aminomethylcyclohexane or 1,4-diamino-2-methylbutane; and B's may be same or different and represent ##STR2## (wherein m is 0, 1 or 2; n is 0 or 1; R.sub.1 is a C.sub.3 -C.sub.6 alkyl group substituted with one or two hydroxyl groups) or two B's jointly represent ##STR3## (wherein R.sub.2 is a C.sub.2 -C.sub.5 alkyl group substituted with one hydroxyl group)].These platinum (II) complexes have high potencies for use as an antitumor agent.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: July 14, 1992
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Osamu Kogawa, Kenji Iwata, Hisao Ekimoto, Tadashi Ishii, Kimihiko Takada