Patents by Inventor Seiichi Tanida

Seiichi Tanida 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).

  • Maytansinoids
    Patent number: 4322348
    Abstract: Novel Antibiotic C-15003PND, which has the formula: ##STR1## wherein R represents hydrogen, --CO--CH.sub.3, --CO--CH.sub.2 --CH.sub.3, ##STR2## is produced by cultivating a microorganism of the genus Nocardia. The Antibiotic C-15003PND wherein R is acetyl, propionyl, isobutyryl or isovaleryl is useful for an antifungal, antiprotozoal or antitumor agent and Antibiotic C-15003PND wherein R is hydrogen is useful for an intermediate thereof.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: March 30, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Mitsuko Asai, Motowo Izawa, Seiichi Tanida
  • Antibiotic
    Patent number: 4320200
    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: March 19, 1980
    Date of Patent: March 16, 1982
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Mitsuko Asai, Seiichi Tanida
  • Antibiotic C-14482 A.sub.1 and method for producing same
    Patent number: 4298600
    Abstract: A novel antibiotic C-14482 A.sub.1 is produced by cultivating a microorganism belonging to the genus Nocardia and capable of producing Antibiotic C-14482 A.sub.1 in a culture medium, whereby Antibiotic C-14482 A.sub.1 is elaborated and accumulated in the culture medium, and recovering the same antibiotic.Antibiotic C-14482 A.sub.1 is useful as a germicide or disinfectant.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: November 3, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Seiichi Tanida, Masayuki Muroi, Mitsuko Asai
  • Antibiotics C-14482 B.sub.1, B.sub.2 and B.sub.3
    Patent number: 4292309
    Abstract: Novel antibiotics C-14482 B.sub.1, B.sub.2 and B.sub.3 are produced by cultivating a microorganism belonging to the genus Nocardia and capable of producing Antibiotics C-14482 B.sub.1, B.sub.2 and/or B.sub.3 in a culture medium, whereby Antibiotics C-14482 B.sub.1, B.sub.2 and/or B.sub.3 are elaborated and accumulated in the cultured broth and are recovered.Antibiotics C-14482 B.sub.1, B.sub.2 and B.sub.3 are useful as a germicide or disinfectant, respectively.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: September 29, 1981
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Eiji Higashide, Seiichi Tanida, Masayuki Muroi, Mitsuko Asai
  • 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
  • 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