Patents by Inventor Michitaro Nagasawa

Michitaro Nagasawa 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).

  • Process for the microbiological oxidation of steroids
    Patent number: 4101378
    Abstract: The improvement in a process for the production of 17-hydroxyandrosta-1,4-dien-3-one and androsta-1,4-diene-3,17-dione by the microbiological oxidation of a sterol, its 4-en-3-one derivative or its 1,4-dien-3-one derivative, which comprises adding to the culture medium at least one glyceride-containing substance selected from the group consisting of glycerides, fats, oil seeds and oil fruits in an amount sufficient that the culture medium contains at least 0.3 percent by weight of glycerides.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: July 18, 1978
    Assignees: Mitsubishi Chemical Industries Limited, Noda Institute for Scientific Research
    Inventors: Daikichiro Nishikawa, Yukio Imada, Masayuki Kinoshita, Katsuhiko Takahashi, Hajime Machida, Michitaro Nagasawa
  • Process for the microbiological oxidation of steroids
    Patent number: 4057469
    Abstract: The improvement in a process for the production of 17-hydroxyandrosta-1,4-dien-3-one and androsta-1,4-diene-3,17-dione by the microbiological oxidation of a sterol, its 4-en-3-one derivative or its 1,4-dien-3-one derivative, which comprises adding to the culture medium at least one glyceride-containing substance selected from the group consisting of glycerides, fats, oil seeds and oil fruits in an amount sufficient that the culture medium contains at least 0.3 percent by weight of glycerides.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: November 8, 1977
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Daikichiro Nishikawa, Yukio Imada, Masayuki Kinoshita, Katsuhiko Takahashi, Hajime Machida, Michitaro Nagasawa