Patents by Inventor Kyousuke Yotsumoto

Kyousuke Yotsumoto 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 producing L-threonine by fermentation with P. rettgeri.
    Patent number: 5342766
    Abstract: Higher amount of L-threonine can be accumulated by the cultivation of certain microorganism belonging to the genus Providencia, having a resistance to methionine antagonist and having capabilities of producing L-threonine.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: August 30, 1994
    Assignee: Toray Industries, Inc.
    Inventors: Katsushige Yamada, Kyousuke Yotsumoto
  • Process for producing L-threonine by fermentation
    Patent number: 5264353
    Abstract: Microorganisms belonging to the genus Providencia or the genus Escherichia and having a resistance to isoleucine antagonist, produce L-threonine by fermentation in higher yield and in more amount of L-threonine accumulated.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: November 23, 1993
    Assignee: Toray Industries, Inc.
    Inventors: Katsushige Yamada, Hiromi Tsutsui, Kyousuke Yotsumoto, Masae Takeuchi, Makoto Shirai
  • Process for producing L-threonine by fermentation
    Patent number: 5098835
    Abstract: Microorganisms belonging to the genus Providencia the species rettgeri at least leucine for the growth thereof, produce L-threonine by fermentation in higher yield and with increased amount of L-threonine accumulated.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: March 24, 1992
    Assignee: Toray Industries, Inc.
    Inventors: Katsushige Yamada, Hiromi Tsutsui, Kyousuke Yotsumoto, Makoto Shirai
  • Method for producing pyruvic acid by fermentation
    Patent number: 4971907
    Abstract: By cultivating microorganisms belonging to genus Torulopsis, requiring thiamine and biotin for their growth and having an ability to produce pyruvic acid, it is enabled to accumulate an appreciable amount of pyrivic acid with little by-product.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: November 20, 1990
    Assignee: Toray Industries
    Inventors: Reiko Miyata, Tetsu Yonehara, Kyousuke Yotsumoto, Hiromi Tsutsui
  • Process for eliminating metal ions from a metal ion-containing liquid with solid chelate resins
    Patent number: 4152493
    Abstract: Metal ions, for example, heavy metal ions, alkaline earth metal ions and aluminium ions are eliminated by bringing a liquid containing the metal ions into contact with a special chelate resin in which chelating carboxylic anion groups are associated with basic amino acid cations, for example, lysine, ornithine, histidine, arginine, .alpha.,.beta.-diaminopropionic acid, .alpha.,.gamma.-diaminobutyric acid, L-citrulline and .delta.-oxylysine.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: May 1, 1979
    Assignee: Toray Industries, Inc.
    Inventors: Kyousuke Yotsumoto, Minoru Hinoura, Motojiro Goto