Patents by Inventor Tsutomu Matsuishi

Tsutomu Matsuishi 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 separation of a basic amino acid from a fermentation broth using cation exchange resins
    Patent number: 4714767
    Abstract: A process for separating basic amino acids from a liquid containing the same using cation exchange resin towers in series, which comprises effecting repetitive adsorption and elution steps in sequence, wherein the washing water employed in said adsorption and elution steps is obtained by recycling the latter portion of a liquid discharged from a first tower of the adsorption step into an adsorption step in a subsequent cycle, or by recycling a liquid discharged from a first tower at the elution step into an elution step in a subsequent cycle.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: December 22, 1987
    Assignee: Ajinomoto Co., Inc.
    Inventors: Kiyoshi Tanaka, Masaru Saeki, Tsutomu Matsuishi, Yoshihiro Koga, Tetsuya Kawakita
  • Method for separating a basic amino acid
    Patent number: 4691054
    Abstract: A method for separating a basic amino acid from a liquor containing the same, which entails (a) contacting the basic amino containing liquor with a strongly acidic cation exchange resin at a pH at which the basic amino acid exists in the form of a divalent cation, thereby adsorbing at least a part of the basic amino acid in the form of the divalent cation; (b) contacting said ion exchange resin with a liquor containing said basic amino acid and a neutral amino acid or an acidic amino acid at a pH at which the basic amino acid exists in the form of a monovalent cation; (c) passing an eluant through said ion exchange resin, thereby eluting the basic amino acid from the ion exchange resin; and (d) separating and recovering the basic amino acid from the eluate.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: September 1, 1987
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takafumi Tosa, Yoshihiro Koga, Tsutomu Matsuishi
  • L-phenylalanine 1/2 sulfate and its use
    Patent number: 4399304
    Abstract: The present invention relates to L-phenylalanine 1/2 sulfate and its use in the purification of L-phenylalanine from fermentation broths. When the salt is crystallized from a fermentation broth of L-phenylalanine or a solution produced during an intermediate process of recovering L-phenylalanine from the fermentation broth, impurities derived from the fermentation broth are easily removed.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: August 16, 1983
    Assignee: Ajinomoto Company Incorporated
    Inventors: Tsutomu Matsuishi, Hiromasa Maruyama, Toshio Kitahara, Akemi Kabashima, Ryuta Toyomasu
  • Method of producing carbon source for fermentation
    Patent number: 4066502
    Abstract: A hydrolyzate of molasses, containing both glucose and fructose, is mixed with calcium hydroxide, and a fructose addition precipitate is recovered. The residual liquor is neutralized, calcium ions are removed, and then the liquor is used as a carbon source for glutamic acid or lysine fermentation.The present method may supply very inexpensive fructose to the market.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: January 3, 1978
    Assignee: Ajinomoto Co., Inc.
    Inventors: Soichiro Asai, Tsutomu Matsuishi, Katsunobu Matsushita, Shigeho Ikeda, Kaetsu Kobayashi, Hiromasa Maruyama