Patents by Inventor Shujiro Seo

Shujiro Seo 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 corosolic acid
    Patent number: 7071229
    Abstract: This invention provides an improved process for producing corosolic acid starts from ursolic acid, which occurs in plants in relatively large amounts, the method comprising the steps of oxidizing the hydroxyl group at 3-position and utilizing the carbonyl group at 3-position to introduce a hydroxyl group stereospecifically into the 3-oxoursolic acid at the 2?-position adjacent to the hydroxyl group at 3-position.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: July 4, 2006
    Assignee: Tokiwa, Phytochemical Co., Ltd.
    Inventors: Hiromitsu Takayama, Mariko Kitajima, Tomoko Ishizuka, Shujiro Seo
  • Process for producing corosolic acid
    Publication number: 20050020681
    Abstract: This invention provides an improved process for producing corosolic acid starts from ursolic acid, which occurs in plants in relatively large amounts, the method comprising the steps of oxidizing the hydroxyl group at 3-position and utilizing the carbonyl group at 3-position to introduce a hydroxyl group stereospecifically into the 3-oxoursolic acid at the 2?-position adjacent to the hydroxyl group at 3-position.
    Type: Application
    Filed: June 15, 2004
    Publication date: January 27, 2005
    Inventors: Hiromitsu Takayama, Mariko Kitajima, Tomoko Ishizuka, Shujiro Seo
  • Apocynum venetum extract for use as antidepressant
    Patent number: 6737085
    Abstract: The present invention provides (1) an Apocynum extract containing not less than 4% of flavonoid compounds and is free of hypericin and hyperforin, (2) an antidepressant composition (in the form of a food, dietary supplement or medicine) containing the Apocynum extract, and (3) a method for treating depression using the Apocynum extract.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: May 18, 2004
    Assignee: Tokiwa Phytochemical Co., Ltd.
    Inventors: Sansei Nishibe, Tsutomu Sasaki, Shujiro Seo, Veronika Butterweck
  • Antidepressant
    Publication number: 20020090403
    Abstract: The present invention provides (1) an Apocynum extract containing not less than 4% of flavonoid compounds, (2) an antidepressant composition (in the form of a food, dietary supplement or medicine) containing the Apocynum extract, and (3) a method for treating depression using the Apocynum extract.
    Type: Application
    Filed: November 1, 2001
    Publication date: July 11, 2002
    Inventors: Sansei Nishibe, Tsutomu Sasaki, Shujiro Seo, Veronika Butterweck