Patents by Inventor Tanaka Sadao

Tanaka Sadao 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).

  • Pyrazoloindazole derivatives and pharmaceutical composition containing the same
    Patent number: 4415569
    Abstract: Pyrazoloindazole derivatives of the formula: ##STR1## [wherein R.sub.1 is a cyano group, carboxy group, a lower alkoxycarbonyl group or a group ##STR2## (wherein R.sub.2 and R.sub.3 are each a hydrogen atom, a lower alkyl group, a phenyl group which may have a substituent or when taken together with a nitrogen atom, form a heterocyclic ring); X.sup..crclbar. is a counter ion], a process for preparing the same and a pharamaceutical composition containing the same are disclosed. The compounds of the formula above have bronchodilating action and are useful as a medicine.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: November 15, 1983
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Fujimura Yasuo, Tanaka Sadao, Matsunaga Isao, Yasuyuki Shiraki, Yugo Ikeda, Tamotsu Yamazaki, Yasuhiro Ohba, Kazushige Sakai, Shun-ichi Hata, Minoru Shindo