Patents by Inventor Yoshiaki Shibazaki

Yoshiaki Shibazaki 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).

  • (-)-ritodrine, therapeutic compositions and use, and method of preparation
    Patent number: 5449694
    Abstract: (-)-Ritodrine, that is (-)-erythro-1-(p-hydroxyphenyl)-2-[2-(p-hydroxyphenyl)ethylamino]-1-propan ol or a salt thereof substantially free from the (+)-isomer is disclosed. The compound has a strong suppressive effect on uterine contraction in comparison with (.+-.)-ritodrine and (+)-ritodrine and has the same level of toxicity as these compounds, so that it can be used as a therapeutic agent of threatened premature birth and threatened abortion as well as a therapeutic agent of dysmenorrhea having a high safety.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: September 12, 1995
    Assignee: Meiji Seika Kabushiki Kaisha
    Inventors: Naoki Yamazaki, Yoshimasa Fukuda, Yoshiaki Shibazaki, Tetsutarou Niizato, Isao Kosugi, Shin Yoshioka