Patents by Inventor Ikunori Koshiyama

Ikunori Koshiyama 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).

  • Antioxidant comprising proanthocyanidin as principal component
    Patent number: 4797421
    Abstract: An antioxidant containing a proanthocyanidin which is at least one member selected from the group consisting of those dimers to decimers which have bonded thereto as a structural unit a flavan-3-ol or flavan-3,4-diol represented by the general formula: ##STR1## (wherein R.sub.1 is hydrogen or a hydroxyl group, R.sub.2, R.sub.3 and R.sub.4 are each hydrogen, a hydroxyl group or a methoxy group, and R.sub.5 is hydrogen, a galloyl group or a glycopyranosil group).
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: January 10, 1989
    Assignee: Kikkoman Corporation
    Inventors: Toshiaki Ariga, Ikunori Koshiyama, Danji Fukushima