Patents by Inventor Eiji Sako

Eiji Sako 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).

  • Pyrrolo-benzodiazepine compounds and anti-tumor composition thereof
    Patent number: 4309437
    Abstract: Novel 5,10,11,11a-tetrahydro-8-methyl-11-sulfo or sulfino-1H-pyrrolo[2,1-c][1,4]-benzodiazepin-2-acrylamides which have antitumor activity and low toxicity are prepared by reacting corresponding 11-reactive compound with a reactive sulfur compound to form 11-sulfino compounds and, if desired, oxidizing the 11-sulfino compounds to obtain 11-sulfo compound.
    Type: Grant
    Filed: March 4, 1980
    Date of Patent: January 5, 1982
    Assignee: The Green Cross Corporation
    Inventors: Yasuo Ueda, Yoshio Kagitani, Eiji Sako, Tadakazu Suyama, Nobuhiko Komatsu, Daisuke Satoh
  • Medical appliance made of plastic
    Patent number: 3940802
    Abstract: A medical appliance suitable for use in direct or indirect contact with blood, such as an artificial valve, artificial blood vessel, blood transfusion set, solution infusion set, or blood bag characterized by being composed of 100 parts by weight of polyvinyl chloride and as plasticizer 50 to 100 parts by weight of thermoplastic polyurethane of the polyester type, said polyurethane having a softening point of about 70.degree.C and giving no spot other than that of the origin at the same position loaded the test sample onto the plate in thin-layer chromatogram.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: March 2, 1976
    Assignee: The Green Cross Corporation
    Inventors: Eiji Sako, Hisasi Sasamoto