Patents by Inventor Katsuhiko Takahashi

Katsuhiko Takahashi 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
  • Lawn mower
    Patent number: 4027463
    Abstract: Disclosed is a lawn mower having several pairs of rotatable blades attached to a rotatable frame. The rotatable frame is motor driven, and centrifugal forces cause a frictional engagement between blade driving means and a portion of the frame so that each pair of the blades assume a planetary rotary motion, yet are capable of movement away from obstacles.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: June 7, 1977
    Assignee: Fuso Keigokin Co., Ltd.
    Inventors: Katsuhiko Takahashi, Hachiro Doi