Patents by Inventor Tsuneo Saita

Tsuneo Saita 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).

  • Cephalosporin compounds, processes for their preparation and antibacterial agents
    Patent number: 4883879
    Abstract: A cephalosporin compound having the formula: ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, a methoxy group, a substituted or unsubstituted vinyl group, or --CH.sub.2 --A wherein A is a hydrogen atom, an azido group, an acyloxy group, a carbamoyloxy group, a substituted or unsubstituted heterocyclic group (wherein the hetrocyclic ring is a 5- or 6-membered heterocyclic ring having from 1 to 4 oxygen, nitrogen or sulfur atoms), or a substituted or unsubstituted heterocyclic thio group (wherein the heterocyclic ring is a monocyclic or bicyclic heterocyclic ring having from 1 to 5 oxygen, nitrogen or sulfur atoms), or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: November 28, 1989
    Assignee: Kaken Pharmaceutical Co., Ltd.
    Inventors: Yoshiyuki Zama, Nobuo Ishiyama, Tsuneo Saita, Takanobu Naito, Masao Hirose, Masaaki Yokoyama, Taiji Asano, Hisato Senda, Keiji Sekine, Shigeru Sanai
  • A composition and method of treating selected malignant conditions
    Patent number: 4882314
    Abstract: Disclosed is a novel carcinostatic composition comprising 4,6-0-benzylidene-D-glucopyranose as the active ingredient. This active ingredient exerts a very high carcinostatic activity according to a specific carcinostatic mechanism quite different from that of conventional carcinostatic chemotherapeutic agents. The active ingredient is very low in toxicity and is highly stable and water-soluble. This composition is effective against selected malignant conditions which are carcinoma of the colon, cancer of the stomach, cancer of the tongue, peritonitis carcinomatosa, cancer of the liver and malignancies induced by SV.sub.40 virus.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: November 21, 1989
    Assignees: Rikagaku Kenkyusho, Mutsuyuki Kochi, Kaken Kagaku Kabushiki Kaisha
    Inventors: Setsuo Takeuchi, Mutsuyuki Kochi, Akira Kawarada, Shinichiro Esumi, Kaguya Sasaki, Shozo Kawabata, Tsuneo Saita, Yukio Inoue, Makoto Yamamoto, Keiji Sekine
  • Cephalosporin compounds, and antibacterial agents
    Patent number: 4822786
    Abstract: A cephalosporin compound having the formula: ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, a methoxy group, a substituted or unsubstituted vinyl group, or --CH.sub.2 --A wherein A is a hydrogen atom, an azido group, an acyloxy group, a carbamoyloxy group, a subsituted or unsubstituted heterocyclic group (wherein the hetrocyclic ring is a 5- or 6-membered heterocyclic ring having from 1 to 4 oxygen, nitrogen or sulfur atoms), or a substituted or unsubstituted heterocyclic thio group (wherein the heterocyclic ring is a monocyclic or bicyclic heterocyclic ring having from 1 to 5 oxygen, nitrogen or sulfur atoms), or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: April 18, 1989
    Assignee: Kaken Pharmaceutical Co., Ltd.
    Inventors: Yoshiyuki Zama, Nobuo Ishiyama, Tsuneo Saita, Takanobu Naito, Masao Hirose, Masaaki Yokoyama, Taiji Asano, Hisato Senda, Keiji Sekine, Shigeru Sanai