Patents by Inventor Shigekatsu Tsuchiya

Shigekatsu Tsuchiya 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 optically active carboxylic acid
    Patent number: 7592480
    Abstract: The invention provides a process for producing optically active 2,2-dimethylcyclopropanecarboxylic acid by reacting an optical isomer mixture of 2,2-dimethylcyclopropanecarboxylic acid with an optically inactive amine to form (precipitate, crystallize or the like) an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, for example, optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid. The production (optical resolution, separation of an optically active substance, purification of an optically active substance or the like) of optically active 2,2-dimethylcyclopropanecarboxylic acid which is important as an intermediate for production of agricultural chemicals, medications and the like can easily be conducted at low cost.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: September 22, 2009
    Assignee: Ajinomoto Co., Inc.
    Inventors: Masanobu Yatagai, Masafumi Minomura, Shigekatsu Tsuchiya
  • Process for producing optically active carboxylic acid
    Publication number: 20050065368
    Abstract: The invention provides a process for producing optically active 2,2-dimethylcyclopropanecarboxylic acid by reacting an optical isomer mixture of 2,2-dimethylcyclopropanecarboxylic acid with an optically inactive amine to form (precipitate, crystallize or the like) an ammonium salt of optically active 2,2-dimethylcyclopropanecarboxylic acid, for example, optically active (S)-(+)-2,2-dimethylcyclopropanecarboxylic acid. The production (optical resolution, separation of an optically active substance, purification of an optically active substance or the like) of optically active 2,2-dimethylcyclopropanecarboxylic acid which is important as an intermediate for production of agricultural chemicals, medications and the like can easily be conducted at low cost.
    Type: Application
    Filed: September 7, 2004
    Publication date: March 24, 2005
    Inventors: Masanobu Yatagai, Masafumi Minomura, Shigekatsu Tsuchiya
  • Purified human activin and process for producing the same
    Patent number: 6756482
    Abstract: The present invention provides a process for purifying human activin by cation exchange chromatography and chaotropic ion concentration gradient elution.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: June 29, 2004
    Assignee: Ajinomoto Co., Inc.
    Inventors: Kunio Ono, Shigekatsu Tsuchiya, Daisuke Ejima, Yuzuru Eto
  • Method of refolding human activin A
    Patent number: 6084076
    Abstract: A method for industrially producing human activin A which comprises refolding a modified human activin A produced by a microorganism into natural-form human activin A having a biological activity. This method comprises the steps of: (a) solubilizing the modified human activin A with a modifier and then protecting the thiol groups with glutathione and/or sodium sulfite; and (b) dialyzing the protected modified human activin A with a refolding buffer, containing taurodexoycholic acid or its salts and then adding a thiol compound thereto conduct a disulfide bond interchange reaction.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: July 4, 2000
    Assignee: Ajinomoto Co., Inc.
    Inventors: Daisuke Ejima, Kunio Ono, Michiro Sasaki, Yuzuru Eto, Shigekatsu Tsuchiya
  • Insect repellents and a method of repelling insects
    Patent number: 4219570
    Abstract: A class of .alpha.-branched chain alkyl or alkenyl substituted benzene compounds have excellent repelling activities against numerous noxious insects.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: August 26, 1980
    Assignee: Ajinomoto Company, Incorporated
    Inventors: Shinichi Inazuka, Shigekatsu Tsuchiya
  • Insect attractive compositions
    Patent number: 4160824
    Abstract: Insect attractive compositions contain acid-hydrolyzed defatted cereals (protein hydrolysis percent .gtoreq.70%) which have been neutralized (pH 5 to 9), preferably, after being concentrated 2 to 10 times in strongly acidic media.
    Type: Grant
    Filed: April 5, 1978
    Date of Patent: July 10, 1979
    Assignee: Ajinomoto Co., Inc.
    Inventors: Shinichi Inazuka, Shigekatsu Tsuchiya, Katsumi Suzuki, Toshiaki Miyanishi