Patents by Inventor Kenji Takahara

Kenji Takahara 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).

  • Publication number: 20240120817
    Abstract: A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.
    Type: Application
    Filed: December 23, 2020
    Publication date: April 11, 2024
    Applicants: Mitsubishi Electric Corporation, OSAKA UNIVERSITY
    Inventors: Haruyuki KOMETANI, Ryoji MIYATAKE, Takuro YAMADA, Kenji TANAKA, Katsuhiro HIRATA, Noboru NIGUCHI, Kazuaki TAKAHARA, Hironori SUZUKI, Takuya ITO
  • Patent number: 4898822
    Abstract: A process for preparing optically active indoline-2-carboxylic acid by an optical resolution, which comprises subjecting a racemic ester of (R,S)-indoline-2-carboxylic acid having the general formula [(R,S)-I] to the action of an enzyme or a microorganism having a stereo-selective esterase activity, which is capable of asymmetrically hydrolyzing the racemic ester [(R,S)-I] to give optically active indoline-2-carboxylic acid having the formula [II*] so as to produce the hydrolysis product, i.e. optically active indoline-2-carboxylic acid [II*] and an unreacted optically active ester of indoline-2-carboxylic acid having the general formula [I*], isolating each optically active form, and further, if necessary, hydrolyzing the obtained optically active ester [I*] to give an optical antipode of the acid [II*].According to the process of the present invention, optically active indoline-2-carboxylic acid with a high optical purity can be prepared in a simple process with a good yield.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: February 6, 1990
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masanori Asada, Shigeki Hamaguchi, Hidetoshi Katsuki, Yoshio Nakamura, Hideyuki Takahashi, Kenji Takahara, Yoshio Shimada, Takehisa Ohashi, Kiyoshi Watanabe
  • Patent number: 4123329
    Abstract: A process for producing L-lysine by fermentation, comprising the steps of aerobically cultivating a strain having the ability to produce L-lysine and derived from Nocardia alkanoglutinousa No. 223, in a culture medium containing an assimilable carbon source and an assimilable nitrogen source, to accumulate L-lysine in the culture medium and then recovering L-lysine.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: October 31, 1978
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tsutomu Tanaka, Yoshio Nakamura, Koji Asahi, Tadayoshi Shiraishi, Kenji Takahara