Patents by Inventor Yukitaka Okada

Yukitaka Okada 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 making theanine
    Patent number: 8211674
    Abstract: In a method of making theanine, glutaminase is derived from microbes of one or more of Bacillus, mold and yeast is caused to act on glutamine and ethylamine derivative.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: July 3, 2012
    Assignee: Taiyokagaku Co., Ltd.
    Inventors: Yukitaka Okada, Makoto Ozeki, Nobuyuki Aoi
  • Process for producing theanine
    Patent number: 7335497
    Abstract: A method for efficiently producing theanine is provided, wherein glutamine and ethylamine are reacted by Pseudomonas citronellosis GEA FERM BP-8353, which is newly separated/selected from natural soil, belongs to the genus, Pseudomonas, and the species citronellosis and is a theanine producing bacteria with activities of transferring the ?-glutamyl group. Theanine production increased by four times by using glutaminase derived from the bacteria in a mixture of glutamine and ethylamine at a pH in a range of 9-12 in comparison with conventional methods.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: February 26, 2008
    Assignee: Taiyokagaku Co., Ltd.
    Inventors: Takashi Tachiki, Yukitaka Okada, Makoto Ozeki, Tsutomu Okubo, Lekh Raj Juneja, Nagahiro Yamazaki
  • Method of Making Theanine
    Publication number: 20070224667
    Abstract: In a method of making theanine, glutaminase is derived from microbes of one or more of Bacillus, mold and yeast is caused to act on glutamine and ethylamine derivative.
    Type: Application
    Filed: June 22, 2005
    Publication date: September 27, 2007
    Inventors: Yukitaka Okada, Makoto Ozeki, Nobuyuki Aoi
  • Process for producing theanine
    Publication number: 20060105437
    Abstract: To provide a new method for efficiently producing theanine, by which theanine is simply and industrially advantageously produced. Pseudomonas citronellosis GEA, which is newly separated/selected from natural soil, belongs to the genus, Pseudomonas, and the species citronellosis and is theanine producing bacteria with activities of transferring ?-glutamyl group. Theanine is extremely efficiently produced by using glutaminase derived from the bacteria in a mixture of glutamine and ethylamine at pH 9-12 in comparison with a conventional method.
    Type: Application
    Filed: April 22, 2003
    Publication date: May 18, 2006
    Inventors: Takashi Tachiki, Yukitaka Okada, Makoto Ozeki, Tsutomu Okubo, Lekh Juneja, Nagahiro Yamazaki