Patents by Inventor Mitsuteru Numazawa

Mitsuteru Numazawa 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).

  • Oxa- or azasteroid derivatives
    Patent number: 5519051
    Abstract: Compounds are described having the formula ##STR1## wherein A denotes C.dbd.O, CH.sub.2, C.dbd.CH.sub.2 or C.dbd.CH-lower alkyl;B denotes O, NH or N-lower alkyl;X does not exist, or denotes C.dbd.O or CH.sub.2 ;n denotes 2 or 3 when X does not exist, or denotes 1 or 2 when X denotes C.dbd.O or CH.sub.2 ; andthe broken line between the 1- and 2-positions of the steroid skeleton means that a double bond may optionally exist there. These compounds have an aromatase inhibition action and are useful for prophylaxis or treatment of diseases caused by excess of estrogens, for example, breast cancer, uterine cancer, prostatic hypertrophy, etc.
    Type: Grant
    Filed: September 28, 1993
    Date of Patent: May 21, 1996
    Assignee: Teikoku Hormone Mfg. Co., Ltd.
    Inventors: Naoyuki Koizumi, Shigehiro Takegawa, Shigeki Iwashita, Tomoko Kawachi, Teruaki Matsui, Seijiro Honma, Hiroo Takahashi, Mamoru Mieda, Koichi Minato, Kenyu Shibata, Mitsuteru Numazawa