Patents by Inventor Satoru Tsuda

Satoru Tsuda 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).

  • Method of producing optically active N-methylamino acids
    Publication number: 20010036660
    Abstract: A method of producing an optically active N-methylamino acid of the general formula (2): 1
    Type: Application
    Filed: January 16, 2001
    Publication date: November 1, 2001
    Applicant: Kaneka Corporation
    Inventors: Satoru Tsuda, Takahisa Kato, Yoshihiko Yasohara, Junzo Hasegawa
  • Microbial process for biotransformation to (R)-3-chloro-1,2-propanediol
    Patent number: 5846793
    Abstract: A process for preparing optically active (R)-3-chloro-1,2-propanediol, which comprises subjecting (R,S)-3-chloro-1,2-propanediol to the reaction of a microorganism belonging to genus Serratia in a reaction mixture, and then collecting the residual (R)-3-chloro-1,2-propanediol. According to the process of the present invention, (R)-3-chloro-1,2-propanediol can be efficiently prepared starting from low cost (R,S)-3-chloro-1,2-propanediol.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: December 8, 1998
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hideyuki Takahashi, Satoru Tsuda, Yoshio Nakamura, Masahiro Ogura, Tadayoshi Shiraishi, Yoshio Shimada, Kiyoshi Watanabe
  • Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module
    Patent number: 5209852
    Abstract: There is disclosed a process for scrubbing hollow fiber membranes in at least one hollow fiber membrane module disposed in a hollow fiber membrane filter column wherein the hollow fiber membrane module includes a large number of hollow fibers bundled together therein as the hollow fiber membranes. In the process, the filtration step of passing raw water through the pores of the hollow fibers from the outsides thereof to the insides thereof to thereby trap the fine particles on the outer surfaces of the hollow fibers is followed by the scrubbing step of charging bubbles into water around the outer surfaces of the hollow fibers to agitate the water to vibrate the hollow fibers, thereby exfoliating the fine particles trapped on the outer surfaces of the hollow fibers.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: May 11, 1993
    Assignee: Japan Organo Co. Ltd.
    Inventors: Yoshio Sunaoka, Keisuke Kitazato, Satoru Tsuda
  • Filtration process using hollow fiber membrane module
    Patent number: 5151191
    Abstract: There is disclosed a filtration process using at least one hollow fiber membrane module including a large number of porous hollow fibers bundled therein. In the process, the filtration step of passing raw water containing fine particles through the pores of the hollow fibers from the outsides thereof to the insides thereof to thereby trap the fine particles on the outer surfaces of the hollow fibers is followed by the cooling step of lowering the temperature of water inside the hollow fiber membrane module to cool the hollow fibers before the scrubbing step of charging bubbles into water around the outer surfaces of the hollow fibers to vibrate the hollow fibers to thereby exfoliate the fine particles trapped on the outer surfaces of the hollow fibers. The scrubbing step is followed by the drain step of draining the resulting waste water out of the system.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: September 29, 1992
    Assignee: Japan Organo Co., Ltd.
    Inventors: Yoshio Sunaoka, Keisuke Kitazato, Satoru Tsuda