Patents by Inventor Mitsuko Asai

Mitsuko Asai 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).

  • Maytansinol esters
    Patent number: 4225494
    Abstract: A novel Antibiotic C-15003 is produced by cultivating a microorganism of the genus Nocardia.The Antibiotic C-15003 is useful as an antifungal agent or an antiprotozoan agent.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: September 30, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Mitsuko Asai, Seiichi Tanida
  • Antibiotic C-11924 F-1
    Patent number: 4189472
    Abstract: A novel Antibiotic C-11924 F-1 is produced by cultivating a microorganism belonging to the genus Streptoverticillium and capable of producing Antibiotic C-11924 F-1 in a culture medium, causing the microorganism to accumulate Antibiotic C-11924 F-1 in the cultured broth and recovering the same therefrom.Antibiotic C-11924 F-1 is useful for a germicide or disinfectant.
    Type: Grant
    Filed: January 17, 1978
    Date of Patent: February 19, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Toru Hasegawa, Mitsuko Asai, Kazunori Hatano
  • Antibiotics produced from the microorganism nocardice
    Patent number: 4187292
    Abstract: The present invention relates to antibiotics C-14919 E-1 and E-2 produced by cultivating a microorganism of the genus Nocardia. These antibiotics display a wide activity against e.g. Gram-positive bacteria, fungi and yeast and are useful as germicides or disinfectants.
    Type: Grant
    Filed: July 12, 1977
    Date of Patent: February 5, 1980
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Mitsuko Asai, Toru Hasegawa
  • Method for producing Antibiotic C-15003 by culturing nocardia
    Patent number: 4162940
    Abstract: A novel Antibiotic C-15003 is produced by cultivating a microorganism of the genus Nocardia.The Antibiotic C-15003 is useful as an antifungal agent or an antiprotozoan agent.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: July 31, 1979
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Mitsuko Asai, Seiichi Tanida
  • Method for producing maytansinol and its derivatives
    Patent number: 4151042
    Abstract: Maytansinol, maytanacine or maytansinol propionate is (are) produced by cultivating a microorganism belonging to the genus Nocardia and being capable of producing maytansinol, maytanacine or maytansinol propionate, causing the microorganism to accumulate maytansinol, maytanacine or maytansinol propionate and recovering the same.Those compounds are useful for anti-tumor agents.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: April 24, 1979
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Mitsuko Asai, Seiichi Tanida
  • Method for preparing antibiotic P-2563 using Pseudomonas fluorescens
    Patent number: 4108724
    Abstract: A novel antibiotic P-2563 is produced by cultivating a microorganism of the genus Pseudomonas.The antibiotic is useful as a drug for the treatment of pustule, and also useful as a disinfectant.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: August 22, 1978
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Nara, Yasuhiro Sumino, Mitsuko Asai, Shunichi Akiyama