Patents by Inventor Tadamichi Sonoda

Tadamichi Sonoda 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 for the production of a lutein-fatty acid ester concentrate
    Patent number: 7112689
    Abstract: The present invention relates to a method for the production of a lutein-fatty acid ester concentrate of high purity by dissolving marigold oleoresin in a ketone solvent such as acetone, cooling the solution, and removing wherefrom a ketone solvent-insoluble component to uniform the quality of oleoresin, followed by dissolving the acetone-soluble portion obtained as above in butanol, cooling the solution, removing a butanol-soluble impurity after adding or without adding one or more members selected from the group consisting of water, methanol, ethanol and a mixture thereof, and washing the resulting butanol-insoluble with ethanol.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: September 26, 2006
    Assignee: Riken Vitamin Co., Ltd.
    Inventors: Shin Sadano, Koichi Harada, Tadamichi Sonoda
  • Method for the production of a lutein-fatty acid ester concentrate
    Publication number: 20030130531
    Abstract: The present invention relates to a method for the production of a lutein-fatty acid ester concentrate of high purity by dissolving marigold oleoresin in a ketone solvent such as acetone, cooling the solution, and removing wherefrom a ketone solvent-insoluble component to uniform the quality of oleoresin, followed by dissolving the acetone-soluble portion obtained as above in butanol, cooling the solution, removing a butanol-soluble impurity after adding or without adding one or more members selected from the group consisting of water, methanol, ethanol and a mixture thereof, and washing the resulting butanol-insoluble with ethanol.
    Type: Application
    Filed: December 31, 2002
    Publication date: July 10, 2003
    Inventors: Shin Sadano, Koichi Harada, Tadamichi Sonoda
  • Multicore type carotenoid beads
    Publication number: 20020052421
    Abstract: The subject of the invention is to prepare carotenoid beads with high concentration and with less bleeding.
    Type: Application
    Filed: October 22, 2001
    Publication date: May 2, 2002
    Applicant: RIKEN VITAMIN CO., LTD.
    Inventors: Shin Sadano, Tadamichi Sonoda